Co-reporter:Jun Tang, Shibing Ni, Qichang Chen, Jicheng Zhang, Xuelin Yang
Materials Letters 2017 Volume 201(Volume 201) pp:
Publication Date(Web):15 August 2017
DOI:10.1016/j.matlet.2017.04.120
•The fabrication of CuS on Cu foam via in situ electrochemical corrosion.•3D porous architecture of CuS that consists of numerous nanoflakes.•Prominent performance of the CuS@Cu freestanding electrode.•A novel electrochemical reconstruction of the CuS@Cu in cycling.3D porous CuS@Cu composite is prepared via a facile H2O2 aided electrochemical corrosion method, which shows prominent electrochemical performance as freestanding electrode for Li-ion batteries. It delivers no capacity fading at a specific current of 0.5 A g−1, showing discharge/charge of 845/834 mAh g−1 after 500 cycles. After 50 cycles at various specific current from 0.1 to 1.5 A g−1, the CuS@Cu electrode can still exhibit no capacity fading over 300 cycles at 2 A g−1, delivering discharge capacity of 414 mAh g−1.Download high-res image (105KB)Download full-size image
Co-reporter:Jun Tang, Shibing Ni, Qichang Chen, Xuelin Yang, Lulu Zhang
Journal of Alloys and Compounds 2017 Volume 698(Volume 698) pp:
Publication Date(Web):25 March 2017
DOI:10.1016/j.jallcom.2016.12.193
•Optimized fabrication of NiCr2O4 as a new anode material for LIBs.•A facile and low cost approach to prepare high performance NiCr2O4 electrode.•First evaluation on the performance of NiCr2O4 in a full cell.Temperature dependent fabrication of NiCr2O4 is studied and the application of the as-prepared NiCr2O4 in both half-cell with Li metal anode and full-cell with LiFePO4 cathode are assessed. When mixing with natural graphite (NG), the NiCr2O4 obtained at 550 °C can deliver initial charge and discharge capacities of 795 and 1275.5 mAh g−1 at a specific current of 150 mA g−1, maintaining of 939 and 955 mAh g−1 after 140 cycles. In contrast, after 140 cycles at the same specific current, the NiCr2O4 obtained at 450 °C and 650 °C can maintain charge/discharge capacities of 800/814 and 523/528 mAh g−1, respectively. When matching with a LiFePO4 cathode, The NiCr2O4/NG (obtained at 550 °C) electrode delivers initial discharge capacity of 285 mAh g−1, which maintains of 106 mAh g−1 after 50 cycles at a specific current of 100 mA g−1.Download high-res image (314KB)Download full-size image
Co-reporter:Huachao Tao, Lingyun Xiong, Shaolin Du, Yaqiong Zhang, Xuelin Yang, Lulu Zhang
Carbon 2017 Volume 122(Volume 122) pp:
Publication Date(Web):1 October 2017
DOI:10.1016/j.carbon.2017.06.040
Flexible and thin energy storage devices have attracted enormous attentions. An easy and large-scale method has been employed to fabricate flexible and interwoven N, P dual-doped carbon fibers/graphitic carbon nitride (huCP/g-C3N4) using filter paper as a precursor. The huCP/g-C3N4 composite as self-supporting anode for lithium ion batteries exhibits high reversible capacities of 1030 mAh g−1 after 1000 cycles at 1 A g−1 and 360 mAh g−1 after 4000 cycles at 10 A g−1 along with excellent rate performance (133 mAh g−1 at 30 A g−1). For sodium ion batteries, huCP/g-C3N4 as anode delivers high reversible capacities of 345 mAh g−1 after 380 cycles at 0.1 A g−1 and 110 mAh g−1 after 4000 cycles at 1 A g−1. This excellent electrochemical performance can be attributed to the high contents of doped N and P in huCP/g-C3N4 and graphitic carbon nitride network, which not only create more defects and active sites but also expand the layer planes and provide interconnected conductive network.Download high-res image (241KB)Download full-size image
Co-reporter:Hua-Bin Sun;Ying-Xian Zhou;Lu-Lu Zhang;Xing-Zhong Cao;Hanu Arave;Hui Fang;Gan Liang
Physical Chemistry Chemical Physics 2017 vol. 19(Issue 7) pp:5155-5162
Publication Date(Web):2017/02/15
DOI:10.1039/C6CP07760A
Li3V2(PO4)3/C (LVP/C) composites have been modified by different ways of Zr-incorporation via ultrasonic-assisted solid-state reaction. The difference in the effect on the physicochemical properties and the electrochemical performance of LVP between Zr-doping and ZrO2-coating has also been investigated. Compared with pristine LVP/C, Zr-incorporated LVP/C composites exhibit better rate capability and cycling stability. In particular, the LVP/C-Zr electrode delivers the highest initial capacity of 150.4 mA h g−1 at 10C with a capacity retention ratio of 88.4% after 100 cycles. The enhanced electrochemical performance of Zr-incorporated LVP/C samples (LVZrP/C and LVP/C-Zr) is attributed to the increased ionic conductivity and electronic conductivity, the improved stability of the LVP structure, and the decreased charge-transfer resistance.
Co-reporter:Hua-Bin Sun;Ying-Xian Zhou;Lu-Lu Zhang;Xing-Zhong Cao;Hanu Arave;Hui Fang;Gan Liang
Physical Chemistry Chemical Physics 2017 vol. 19(Issue 7) pp:5155-5162
Publication Date(Web):2017/02/15
DOI:10.1039/C6CP07760A
Li3V2(PO4)3/C (LVP/C) composites have been modified by different ways of Zr-incorporation via ultrasonic-assisted solid-state reaction. The difference in the effect on the physicochemical properties and the electrochemical performance of LVP between Zr-doping and ZrO2-coating has also been investigated. Compared with pristine LVP/C, Zr-incorporated LVP/C composites exhibit better rate capability and cycling stability. In particular, the LVP/C-Zr electrode delivers the highest initial capacity of 150.4 mA h g−1 at 10C with a capacity retention ratio of 88.4% after 100 cycles. The enhanced electrochemical performance of Zr-incorporated LVP/C samples (LVZrP/C and LVP/C-Zr) is attributed to the increased ionic conductivity and electronic conductivity, the improved stability of the LVP structure, and the decreased charge-transfer resistance.
Co-reporter:Jicheng Zhang, Shibing Ni, Jianjun Ma, Xuelin Yang, Lulu Zhang
Journal of Power Sources 2016 Volume 301() pp:41-46
Publication Date(Web):1 January 2016
DOI:10.1016/j.jpowsour.2015.09.102
•Li3VO4/N–C hybrids are successfully prepared via a facile way.•The Li3VO4/N–C shows homogeneous hybridization between Li3VO4 and N–C at nanoscale.•The Li3VO4/N–C exhibits ultrahigh reversible capacity of 536 mAh g−1.•The Li3VO4/N–C exhibits superlong cycle life over 1100 cycles without capacity attenuation.High capacity and superlong cycle life of Li3VO4 have been actualized via carbon hybridization and N doping. The Li3VO4/N doped C (Li3VO4/N–C) that fabricated via an in situ carbonization method based on an intermedial solution phase delivers initial discharge and charge capacities of 686 and 540 mAh g−1 at a specific current of 0.15 A g−1, which maintain of 538 and 536 mAh g−1 after 800 cycles, showing excellent cycle stability. Meanwhile, the Li3VO4/N–C exhibits superior rate performance and long life performance. After 150 cycles at various specific currents from 0.1 to 2.0 A g−1, the discharge and charge capacities can restore 100% when reverting the specific current to 0.1 A g−1. After 1100 cycles at a specific current of 2.0 A g−1, the discharge and charge capacities can maintain of 340 and 337 mAh g−1, showing no capacity attenuation in cycling.
Co-reporter:Huachao Tao, Lingyun Xiong, Shouchao Zhu, Xuelin Yang, Lulu Zhang
International Journal of Hydrogen Energy 2016 Volume 41(Issue 46) pp:21268-21277
Publication Date(Web):14 December 2016
DOI:10.1016/j.ijhydene.2016.07.220
•Flexible reduced graphene oxide wrapped Si/carbon fibers paper was prepared.•The Si@RGO/CFP exhibits enhanced cycling and rate performance.•The porous structure of carbon fibers accommodates the volume changes of Si.Flexible and lightweight reduced graphene oxide wrapped Si/carbon fibers paper (Si@RGO/CFP) anodes have been prepared by pyrolysis of the common filter paper, which was soaked into the suspension containing graphene oxide and Si. The reduced graphene oxide wrapped Si nanoparticles (Si@RGO) homogeneously distributed on the interlaced carbon fibers and void among the carbon fibers. The Si@RGO/CFP as a flexible binder-free electrode exhibits an initial reversible capacity of 2055 mAh g−1 and 1092 mAh g−1 after 100 cycles for Si@RGO at 100 mA g−1 along with good rate performance. The superior electrochemical performance of the Si@RGO/CFP is attributed to the interconnected carbon fibers substrate, which provides electronic conduction pathways and works as mechanical support, and the void among carbon fibers accommodates the volume changes of Si and maintains the integrity of the electrode materials.
Co-reporter:Hua-Bin Sun, Lu-Lu Zhang, Xue-Lin Yang, Yun-Hui Huang, Zhen Li, Ying-Xian Zhou, Xiao-Kai Ding, Gan Liang
Ceramics International 2016 Volume 42(Issue 15) pp:16557-16562
Publication Date(Web):15 November 2016
DOI:10.1016/j.ceramint.2016.07.075
Abstract
A novel Li3V2(PO4)3 composite modified with Fe-doping followed by C+SiO2 hybrid layer coating (LVFP/C-Si) is successfully synthesized via an ultrasonic-assisted solid-state method, and characterized by XRD, XPS, TEM, galvanostatic charge/discharge measurements, CV and EIS. This LVFP/C-Si electrode shows a significantly improved electrochemical performance. It presents an initial discharge capacity as high as 170.8 mA h g−1 at 1 C, and even delivers an excellent initial capacity of 153.6 mA h g−1 with capacity retention of 82.3% after 100 cycles at 5 C. The results demonstrate that this novel modification with doping followed by hybrid layer coating is an ideal design to obtain both high capacity and long cycle performance for Li3V2(PO4)3 and other polyanion cathode materials in lithium ion batteries.
Co-reporter:Shibing Ni;Jicheng Zhang;Jianjun Ma;Xuelin Yang;Lulu Zhang;Xiaoming Li;Haibo Zeng
Advanced Materials Interfaces 2016 Volume 3( Issue 1) pp:
Publication Date(Web):
DOI:10.1002/admi.201500340
Li3VO4 is a potential anode for Li-ion batteries owing to its safe discharge plateau and high capacity, but the reported reversible capacity is still far from its theoretical value (592 mAh g−1). Here, for the first time, a Li3VO4 anode is reported with reversible capacity approaching the theoretical value. Li3VO4 aggregates hybridized with carbon (Li3VO4/C) are first fabricated, and then dramatically transform into well dispersed Li3VO4 nanocrystals (NCs) anchoring on carbon nanoflakes (NFs) by electrochemical reconstruction. In the Li3VO4/C NC-on-NF structures, the small-sized Li3VO4 NCs, the flexible carbon NFs, and the good dispersity provide high Li-ion storage, electronic conductivity and stability, respectively. Resultingly, outstanding electrochemical performance of the Li3VO4/C is achieved with discharge and charge capacities of 542 and 541 mAh g−1 after 300 cycles at a specific current of 150 mA g−1. After 1000 cycles at a specific current of 2000 mA g−1, the discharge and charge capacities are maintained at 422 and 421 mAh g−1. When matching with a 4 V cathode, the specific energy density of the Li3VO4/C is 4.2 times of Li4Ti5O12 and 1.2 times of graphite, and the volumetric energy density is 3.2 times of Li4Ti5O12 and 1.4 times of graphite.
Co-reporter:Wensheng Han, Ke Yang, Dian Li, Zeliang Zhang, Jianjun Ma, Shibing Ni, Xuelin Yang
Materials Letters 2016 Volume 164() pp:148-151
Publication Date(Web):1 February 2016
DOI:10.1016/j.matlet.2015.10.102
•Zn5(CO3)2(OH)6 microflakes are fabricated via a NaF aided method.•the Zn5(CO3)2(OH)6 is thermally stable up to 200 °C.•the Zn5(CO3)2(OH)6 shows potential application in Li-ion batteries.Zinc carbonate hydroxide, Zn5(CO3)2(OH)6 is successfully prepared via a facile hydrothermal method, which shows flaky morphology with diameter of several micrometers and mean thickness of 200 nm. The Zn5(CO3)2(OH)6 is thermal stable below 200 °C, which gradually decomposes into ZnO in temperature region 210–450 °C. The electrochemical property of the as-prepared Zn5(CO3)2(OH)6 micro-flakes as a new anode material for lithium ion batteries is firstly studied, which exhibits obvious voltage plateaus and stable cycle performance, endowing it with potential application in lithium ion batteries.Zn5(CO3)2(OH)6 micro-flakes were successfully prepared, which show potential application as anode for lithium ion batteries.
Co-reporter:Jicheng Zhang, Shibing Ni, Jun Tang, Xuelin Yang
Materials Letters 2016 Volume 181() pp:25-28
Publication Date(Web):15 October 2016
DOI:10.1016/j.matlet.2016.05.130
•The fabrication of NiS/Ni via an electrochemical corrosion method.•The NiS shows flower-like morphology that consists of flocky particles.•The NiS/Ni exhibits superior electrochemical performance as anode for Li-ion batteries.NiS is successfully grown on Ni foam via an in situ electrochemical corrosion method. It is proposed that H2O2 can act as cathodic depolarizer that promotes the corrosion of Ni, which is crucial for the formation of NiS. The NiS shows flower-like morphology with mean size about 2 µm, consisting of flocky particles with size range from 500 nm to 1 µm. The as prepared NiS/Ni can be directly used as binder free anode for Li-ion batteries, which shows excellent electrochemical performance. It delivers initial discharge and charge capacities are 836 and 668 mA h g−1 at a specific current of 150 mA g−1, respectively. After 70 cycles, the charge capacity can maintain of 589 mA h g−1.NiS/Ni anode is prepared by electrochemical corrosion method, which shows superior electrochemical performance as binder free anode for Li-ion batteries.
Co-reporter:Jicheng Zhang, Shibing Ni, Jun Tang, Xuelin Yang, Lulu Zhang
Materials Letters 2016 Volume 176() pp:21-24
Publication Date(Web):1 August 2016
DOI:10.1016/j.matlet.2016.03.017
•We fabricated porous NiO/C-Ni composite architecture.•The NiO/C-Ni can be used as binder free anode for lithium ion batteries.•The NiO/C-Ni exhibits superior electrochemical performance.NiO/C-Ni composite is prepared via a facile hydrothermal pretreatment and subsequent annealing, which shows excellent cycle stability and superior rate capability as binder free anode for lithium ion batteries. It delivers initial discharge and charge capacity of 971 and 672 mAh g−1 at 0.3C, maintaining of 700 and 669 mAh g−1 after 70 cycles. After 60 cycles at various rates from 0.3 to 12C, the discharge capacity of the NiO/C-Ni electrode can gradually restore when reverting the rate to 0.3C, maintaining of 692 mAh g−1 after 10 cycles. The impressive electrochemical performance demonstrates great potential of the NiO/C-Ni as anode for high performance lithium ion batteries.
Co-reporter:Lu-Lu Zhang;Hua-Bin Sun;Ming Li
Journal of Solid State Electrochemistry 2016 Volume 20( Issue 2) pp:311-318
Publication Date(Web):2016 February
DOI:10.1007/s10008-015-3044-z
Natural graphite treated by mechanical activation can be directly applied to the preparation of Li3V2(PO4)3. The carbon-coated Li3V2(PO4)3 with monoclinic structure was successfully synthesized by using natural graphite as carbon source and reducing agent. The amount of activated graphite is optimized by X-ray diffraction, scanning electron microscope, transmission electron microscope, Raman spectrum, galvanostatic charge/discharge measurements, cyclic voltammetry, and electrochemical impedance spectroscopy tests. Our results show that Li3V2(PO4)3 (LVP)-10G exhibits the highest initial discharge capacity of 189 mAh g−1 at 0.1 C and 162.9 mAh g−1 at 1 C in the voltage range of 3.0–4.8 V. Therefore, natural graphite is a promising carbon source for LVP cathode material in lithium ion batteries.
Co-reporter:Dr. Huachao Tao;Shouchao Zhu;Lingyun Xiong; Xuelin Yang;Lulu Zhang
ChemElectroChem 2016 Volume 3( Issue 7) pp:1063-1071
Publication Date(Web):
DOI:10.1002/celc.201600128
Abstract
A three-dimensional carbon-coated SnO2/reduced graphene oxide (SnO2/RGO/C) foam has been prepared by using glucose as the carbon source and cross-linking agent through a one-step hydrothermal process followed by freeze drying. The foam, as a free-standing anode for lithium-ion batteries, exhibits a large capacity and excellent cycling stability (717 mAh g−1 after 130 cycles at 100 mA g−1). The outstanding electrochemical performance could be related to the synergistic effect between the nano-sized high-capacity SnO2, the excellent electronic conductivity and large specific surface area of RGO, and the carbon coating layer, which could enhance the bonding strength of SnO2 nanoparticles and RGO nanosheets, keep the structural integrity, and increase the electronic conductivity. The strong interaction between SnO2 and RGO, the high electronic conductivity, and the porous structure of the composite result in high electrochemical activity and stable cycling performance as a binder-free anode for lithium-ion batteries.
Co-reporter:Dr. Huachao Tao;Shouchao Zhu;Lingyun Xiong; Xuelin Yang;Lulu Zhang
ChemElectroChem 2016 Volume 3( Issue 7) pp:
Publication Date(Web):
DOI:10.1002/celc.201600333
Co-reporter:Shibing Ni, Jicheng Zhang, Jianjun Ma, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2015 vol. 3(Issue 35) pp:17951-17955
Publication Date(Web):13 Aug 2015
DOI:10.1039/C5TA04402B
A high performance Li3VO4/N-doped C anode was successfully prepared, which delivers an initial discharge/charge capacity of 600/472 mA h g−1 at 150 mA g−1, maintaining 462/460 mA h g−1 after 100 cycles. It shows no capacity attenuation over 2200 cycles at 2000 mA g−1, delivering a discharge/charge capacity of 267/264 mA h g−1.
Co-reporter:Shibing Ni, Jianjun Ma, Jicheng Zhang, Xuelin Yang and Lulu Zhang
Chemical Communications 2015 vol. 51(Issue 27) pp:5880-5882
Publication Date(Web):02 Mar 2015
DOI:10.1039/C5CC00486A
A novel in situ electrochemical reconstruction occurs in NiV3O8/natural graphite electrodes, which results in excellent electrochemical performance. After repeated rate performance from 0.16 to 3.1 A g−1 over 320 cycles, the specific capacity can restore well and shows no obvious attenuation in the subsequent 360 cycles.
Co-reporter:Shibing Ni, Jicheng Zhang, Jianjun Ma, Xuelin Yang, Lulu Zhang
Journal of Power Sources 2015 Volume 296() pp:377-382
Publication Date(Web):20 November 2015
DOI:10.1016/j.jpowsour.2015.07.053
•Li3VO4 nanoparticles embed in N-doped graphene is prepared.•Small size of Li3VO4 can improve the lithium ion diffusion efficiency.•N-doped graphene in the composite can enhance the electronic conductivity.•The Li3VO4/N-doped graphene exhibits superior electrochemical performance.Li3VO4/N-doped graphene with unique architecture of Li3VO4 nanoparticles embed in N-doped graphene is successfully prepared via a facile method, which shows superior electrochemical performance as anode for Li-ion batteries. At a specific current of 0.15 A g−1, it delivers discharge and charge capacities of 550 and 429 mAh g−1 in the initial cycle, which maintain of 478 and 476 mAh g−1 after 100 cycles. After 150 cycles at various specific currents from 0.1 to 2.0 A g−1, the discharge capacity can restore to 487 mAh g−1 when reverting the specific current to 0.1 A g−1. Meanwhile, even after 900 cycles at a specific current of 2.0 A g−1, the Li3VO4/N-doped graphene electrode can deliver discharge and charge capacities of 195 and 193 mAh g−1.Li3VO4/N-doped graphene shows superior electrochemical performance as anode for Li-ion batteries owing to enhanced lithiation/delithiation process and improved structure stability in cycling.
Co-reporter:Shibing Ni, Jianjun Ma, Jicheng Zhang, Xuelin Yang, Lulu Zhang
Journal of Power Sources 2015 Volume 282() pp:65-69
Publication Date(Web):15 May 2015
DOI:10.1016/j.jpowsour.2015.01.187
•A new and facile way was developed to prepare CoV2O6/NG electrode.•Systemic study on the electrochemical characteristics of CoV2O6/NG electrode.•Clear clarification of the charge/discharge mechanism of CoV2O6.•The CoV2O6/NG anode exhibits high capacity and excellent cycle performance.CoV2O6/natural graphite electrode with sodium alginate binder is prepared, which shows excellent electrochemical performance as anode for Li-ion batteries. It exhibits initial discharge and charge capacity of 902 and 638 mAh g−1 at a specific current of 110 mA g−1. After 100 cycles, the discharge and charge capacity maintain of 669 and 665 mAh g−1, respectively. The charge/discharge mechanism of CoV2O6 is also studied, suggesting a structure variation in discharging, which involves the initial formation of LiV2O5 and Co3V2O8, the subsequent transition from Co3V2O8 to LixV2O5 and CoO, and the later reduction of CoO into Co. The structure variation of Co3V2O8 accompanies by an amorphization process, which maintains in the subsequent discharging and charging process.
Co-reporter:Shibing Ni, Jicheng Zhang, Xiaohu Lv, Xuelin Yang, Lulu Zhang
Journal of Power Sources 2015 Volume 291() pp:95-101
Publication Date(Web):30 September 2015
DOI:10.1016/j.jpowsour.2015.05.015
•Porous architecture of Li3VO4/NiO/Ni is prepared via a graft growth method.•The Li3VO4/NiO/Ni undergoes coordinated electrochemical reconstruction in cycling.•The Li3VO4/NiO/Ni exhibits superior electrochemical performance.Coordinated electrochemical effect between Li3VO4 and NiO occurs in Li3VO4/NiO/Ni electrodes owing to the close potential regions of lithiation and delithiation for Li3VO4 and NiO. Remarkably, Li3VO4/NiO/Ni with bottom nanowalls and upper micro-flowers architecture undergoes a novel coordinated electrochemical reconstruction owing to well coordinated morphology variation of Li3VO4 and NiO in lithiation and delithiation process, which leads to the formation of a new symmetrical porous architecture in cycling, resulting in superior electrochemical performance. At a specific current of 70 mA g−1, it exhibits discharge and charge capacity of 860 and 631 mAh g−1 in the initial cycle, maintaining of 612 and 604 mAh g−1 after 100 cycles. After 60 cycles at various specific currents from 54 to 2700 mA g−1, the discharge and charge capacity can restore to 612 mAh g−1 when reverting the specific current to 54 mA g−1.Li3VO4/NiO/Ni composite anode is successfully prepared, which shows superior electrochemical performance owing to a novel coordinated electrochemical reconstruction.
Co-reporter:Shibing Ni, Jianjun Ma, Jicheng Zhang, Xuelin Yang, Lulu Zhang
Electrochimica Acta 2015 Volume 153() pp:546-551
Publication Date(Web):20 January 2015
DOI:10.1016/j.electacta.2014.11.196
•We develop a low cost and facile way to prepare Fe2O3 electrode.•The Fe2O3 electrode shows good electrochemical performance.•The causing of the good electrochemical performance is studied.•The fabrication method can be extended to preparation other high performance TMOS electrode.A low cost and facile way was developed to prepare high performance Fe2O3/natural graphite electrode for lithium ion batteries. For the purpose of reducing the cost and improving the feasibility of large-scale fabrication, commercial ferric oxide and natural graphite were adopted as raw materials and mechanical milling was adopted as preparation method in material fabrication process, and water soluble sodium alginate was adopted as binder in electrode preparation procedure. The Fe2O3/natural graphite electrode delivers initial discharge and charge capacity of 943.8 and 691.4 mAh g-1 at a specific current of 72 mA g-1, maintaining of 687.6 and 679.3 mAh g-1 after 100 cycles. After 60 cycles at various specific currents from 104 to 3470 mA g-1, the discharge and charge capacity of the Fe2O3/natural graphite electrode can restore well when lowering the specific current to 104 mA g-1. A novel electrochemical reconstruction between Fe2O3 and natural graphite was observed for the electrode after cycling, which results in the formation of an integrated architecture with good combination between Fe2O3 and natural graphite, being responsible for the good electrochemical performance.The Fe2O3/natural graphite electrode with sodium alginate shows good electrochemical performance due to the enhanced charge transfer process based on a novel electrochemical reconstruction effect.
Co-reporter:Lu-Lu Zhang, Hua-Bin Sun, Xue-Lin Yang, Yan-Wei Wen, Yun-Hui Huang, Ming Li, Gang Peng, Hua-Chao Tao, Shi-Bing Ni, Gan Liang
Electrochimica Acta 2015 Volume 152() pp:496-504
Publication Date(Web):10 January 2015
DOI:10.1016/j.electacta.2014.11.172
A series of Li2Fe1-xVxSiO4/C (x = 0.00, 0.03, 0.05 and 0.07) composites have been synthesized via a refluxing-assisted solid-state reaction. XRD results confirm the monoclinic structure with space group P21 for Li2Fe1-xVxSiO4/C compounds. TEM and Raman spectroscopy demonstrate V-doping can increase the graphitization degree of residual carbon. XPS confirms that V-incorporation does not change the divalent state of Fe, and the oxidation state of V in V-doped Li2FeSiO4/C is +3. Combined Ar-ion sputtering with XPS, it is found that V has been successfully doped into the crystal lattice of Li2FeSiO4. Electrochemical tests show that LFS/C-5 V delivers the highest initial discharge capacity of 220.4 mAh g−1 and the biggest Li-ion diffusion coefficient of 1.60 × 10−11 cm2 s−1. In addition, the density functional theory (DFT) calculations predict that V-doping decreases the electronic band gap of Li2FeSiO4, thus leads to significant improvement in the electrical conductivity of Li2FeSiO4. The enhanced electrochemical performance can be attributed to the increased electronic conductivity, the decreased charge transfer impedance, and the improved Li-ion diffusion coefficient. Our results clarified the nature of V doping into Li2FeSiO4 and demonstrated that V-doping is a promising approach to improve the electrochemical performance of Li2FeSiO4.
Co-reporter:Jianjun Ma, Shibing Ni, Jicheng Zhang, Xuelin Yang and Lulu Zhang
Physical Chemistry Chemical Physics 2015 vol. 17(Issue 33) pp:21442-21447
Publication Date(Web):29 Jul 2015
DOI:10.1039/C5CP03435C
The charge/discharge mechanism of CuV2O6 as the anode for Li-ion batteries is studied for the first time, suggesting a phase transition in discharging, which initially involves the formation of LiV2O5 and Cu3V2O8, the subsequent transition from Cu3V2O8 to LixV2O5 and CuO, the insertion of lithium ions into LiV2O5, and later the reduction of CuO into Cu. The phase transition of Cu3V2O8 is accompanied by an amorphization process, which is maintained in the subsequent discharging and charging processes. The CuV2O6/natural graphite electrode with a sodium alginate binder is prepared, which shows superior electrochemical performance. At a specific current of 110 mA g−1, it delivers initial discharge and charge capacities of 725 and 453 mA h g−1, respectively, maintaining 537 and 533 mA h g−1 after 200 cycles.
Co-reporter:Ming Li, Lu-Lu Zhang, Xue-Lin Yang, Hua-Bin Sun, Yun-Hui Huang, Gan Liang, Shi-Bing Ni and Hua-Chao Tao
RSC Advances 2015 vol. 5(Issue 29) pp:22818-22824
Publication Date(Web):23 Feb 2015
DOI:10.1039/C5RA02129D
A series of Li2−xNaxFe0.5Mn0.5SiO4/C (x = 0.00, 0.01, 0.03 and 0.05) composites have been synthesized via a refluxing-assisted solid-state reaction, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), galvanostatic charge–discharge measurements, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests. XRD results show that Li2−xNaxFe0.5Mn0.5SiO4/C can be well indexed as the structure of two mixed polymorphs with space group P21 and Pmn21. XPS results confirms that Na not only exists on the surface of Li2Fe0.5Mn0.5SiO4 particles, but also has been successfully doped into the crystal lattice of Li2Fe0.5Mn0.5SiO4. Na-doping can significantly improve the discharge capacity and the rate capability of Li2Fe0.5Mn0.5SiO4/C. The enhanced electrochemical performance can be attributed to the increased electronic conductivity, the decreased charge transfer impedance, and the improved Li-ion diffusion coefficient.
Co-reporter:Hua-Chao Tao, Xue-Lin Yang, Lu-Lu Zhang, Shi-Bing Ni
Journal of Electroanalytical Chemistry 2015 Volume 739() pp:36-42
Publication Date(Web):15 February 2015
DOI:10.1016/j.jelechem.2014.10.035
•Nickel sulfide/N-doped graphene composite has been fabricated.•The N-doped graphene offers a continuous electrically conductive network.•The one-dimensional structure facilitates the diffusion of lithium ions and electrons.•The composite exhibits excellent lithium storage performance.Nickel sulfide/N-doped graphene composite as high performance anode materials has been synthesized through a simultaneous hydrothermal method. The morphology, structure and electrochemical performance of nickel sulfide/N-doped graphene composite were investigated by field emission scanning electron microscopy, transmission electron microscope, X-ray diffraction, Raman spectra, Fourier transform infrared spectra, X-ray photoelectron spectroscopy and electrochemical measurements. The nickel sulfide with a length of about 500 nm and diameter of 100 nm clung to the N-doped graphene matrix. The nickel sulfide/N-doped graphene composite exhibits a relatively high reversible capacity and good cycling stability as anode materials for lithium ion batteries. The good electrochemical performance can be attributed to N-doped graphene, which improves the electronic conductivity of composite and suppresses the volume effect as elastic matrix. The one-dimensional structure of nickel sulfide facilitates the diffusion of lithium ions and electrons.Graphical abstractNickel sulfide/N-doped graphene composite has been prepared through a simple one-step and in situ method using thiourea as the sulfur source and reducing agent. The nickel sulfide/N-doped graphene composite exhibits a relatively high reversible capacity and good cycling stability. The excellent electrochemical performance can be attributed to N-doped graphene, which improves the electronic conductivity of composite and suppresses the volume effect as elastic matrix. The one-dimensional structure of nickel sulfide facilitates the diffusion of lithium ions and electrons. The presence of N atoms can increase the lithium ions storage capacity.
Co-reporter:Shibing Ni, Jianjun Ma, Jicheng Zhang, Xuelin Yang, Lulu Zhang
Materials Letters 2015 Volume 139() pp:138-140
Publication Date(Web):15 January 2015
DOI:10.1016/j.matlet.2014.10.035
•Co(OH)F micro-rods are firstly fabricated via a hydrothermal method.•The electrochemical property of the Co(OH)F micro-rods is firstly studied.•The Co(OH)F micro-rods show potential application in lithium ion batteries.Cobalt fluoride hydroxide, Co(OH)F was successfully prepared via a facile hydrothermal method. The morphology and size of the as-prepared Co(OH)F were characterized by field emission scanning electron microscopy (FE-SEM), which suggests the Co(OH)F exhibits rod-like morphology with mean diameter and mean length about 200 nm and 3 μm, respectively. The electrochemical performance of the as-prepared Co(OH)F micro-rods as anodes for lithium ion batteries was studied by conventional charge/discharge test, which exhibits clear sloping potential regions in charge and discharge curves, endowing it with potential application in lithium ion batteries.Co(OH)F micro-rods are successfully prepared via a facile hydrothermal method.
Co-reporter:Ming Li;Lu-Lu Zhang
Journal of Solid State Electrochemistry 2015 Volume 19( Issue 2) pp:415-421
Publication Date(Web):2015 February
DOI:10.1007/s10008-014-2603-z
Carbon-coated Li2FeSiO4 composite (LFS/C-AA) was synthesized via a refluxing-assisted solid-state reaction by using ascorbic acid as additive and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, galvanostatic charge/discharge measurements, and electrochemical impedance spectra (EIS) tests. The results show that ascorbic acid can to some extent prohibit the oxidation of Fe2+ during the synthesis process, and the pyrolytic carbon from ascorbic acid shows higher electronic conductivity and improves the degree of graphitization of residual carbon in the LFS/C-AA composite. Compared with LFS/C prepared without ascorbic acid, LFS/C-AA displays better electrochemical performance. The desirable property is attributed to the reduced particle size, the enhanced electronic conductivity, and the improved diffusion coefficient of lithium ions.
Co-reporter:Hua-Chao Tao;Lu-Lu Zhang;Shi-Bing Ni
Ionics 2015 Volume 21( Issue 3) pp:617-622
Publication Date(Web):2015/03/01
DOI:10.1007/s11581-014-1218-9
Reduced graphene oxide/porous Si composite was fabricated through magnesiothermic reduction of mesoporous silica and subsequent dispersing porous Si in the suspension of graphene oxide followed by reduced process. The electrochemical performance of the obtained reduced graphene oxide/porous Si composite was investigated as anode for lithium ion batteries, and it delivers a reversible capacity of about 815 mAh g−1 at a rate of 100 mA g−1 in the voltage range of 0.01–1.5 V after 50 cycles. The excellent electrochemical performance of the composite can be attributed to that of the porous structure of conductive reduced graphene oxide network, and dispersed Si particles can improve electronic conductivity and accommodate the large volume changes.
Co-reporter:Shou-Chao Zhu;Hua-Chao Tao;Lu-Lu Zhang;Shi-Bing Ni
Ionics 2015 Volume 21( Issue 10) pp:2735-2742
Publication Date(Web):2015 October
DOI:10.1007/s11581-015-1490-3
N-doped graphene/SnS composite as high-performance anode materials has been synthesized by a simultaneous solvothermal method using ethylene glycol as solvent. The morphology, structure, and electrochemical performance of N-doped graphene/SnS composite were investigated by transmission electron microscope (TEM), X-ray diffraction (XRD), Raman spectra, Fourier transform infrared (FTIR) spectra, X-ray photoelectron spectroscopy (XPS), and electrochemical measurements. The SnS nanoparticles with sizes of 3–5 nm uniformly distribute on the N-doped graphene matrix. The N-doped graphene/SnS composite exhibits a relatively high reversible capacity and good cycling stability as anode materials for lithium ion batteries. The good electrochemical performance can be due to that the N-doped graphene as electron conductor improves the electronic conductivity of composite and elastic matrix accommodates the large volume changes of SnS during the cycles.
Co-reporter:Shibing Ni, Jianjun Ma, Xiaohu Lv, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2014 vol. 2(Issue 24) pp:8995-8998
Publication Date(Web):13 May 2014
DOI:10.1039/C4TA00380B
A NiV3O8/Ni composite was successfully prepared via a novel in situ corrosion method, which shows good electrochemical performance as a new sort of anode for Li-ion batteries. After 60 cycles at various rates from 0.1 to 20 C, the discharge capacity can be restored when the charge–discharge rate is lowered to 0.1 C.
Co-reporter:Shibing Ni, Jianjun Ma, Xiaohu Lv, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2014 vol. 2(Issue 48) pp:20506-20509
Publication Date(Web):10 Nov 2014
DOI:10.1039/C4TA03871A
Porous Cu3P/Cu anode was prepared, which shows good electrochemical performance because of a novel electrochemical reconstruction in cycling. The compatible voltage plateau, specific capacity and density of Cu3P suggest that it can be an ideal high energy density anode for Li-ion batteries.
Co-reporter:Shibing Ni, Xiaohu Lv, Jianjun Ma, Xuelin Yang, Lulu Zhang
Journal of Power Sources 2014 Volume 248() pp:122-129
Publication Date(Web):15 February 2014
DOI:10.1016/j.jpowsour.2013.09.050
•We firstly researched the electrochemical performance of Li3VO4 as anode for Li-ion battery.•We discussed the possible charge/discharge mechanism of Li3VO4.•The Li3VO4 anode shows excellent cycle stability and rate capability.•We found a lithium ion diffusion controlled mechanism for the Li3VO4 anode.Li3VO4 is fabricated by a facile hydrothermal method and subsequent annealing treatment. The electrochemical performance and the possible charge/discharge mechanism of the as-prepared Li3VO4 as anode for Li-ion battery are firstly studied. Galvanostatic battery testing shows that the Li3VO4 electrode exhibits excellent cycle stability and rate capability. At a current density of 0.25 C, it delivers initial discharge and charge capacity about 624 and 481 mAh g−1, respectively, which maintains of 398 and 396 mAh g−1 after 100 cycles. After 60 cycles at various rates from 0.2 to 4.0 C, the discharge capacity can restore 98% when lowering the charge/discharge rate to 0.2 C. A possible redox reaction mechanism is proposed to interpret the lithiation/delithiation process of Li3VO4 according to experimental observations. The electrochemical reaction kinetic of the Li3VO4 electrode is studied by cyclic voltammetry measurement at various scan rate, which indicates the anodic and cathodic peak currents show linear dependence on the square root of scan rate from 0.3 to 1.0 mV s−1, suggesting a lithium ion diffusion controlled mechanism in the charge/discharge process.The electrochemical performance of Li3VO4 as anode for Li-ion battery was firstly studied, which shows excellent cycle stability and rate capability.
Co-reporter:Shibing Ni, Xiaohu Lv, Jicheng Zhang, Jianjun Ma, Xuelin Yang, Lulu Zhang
Electrochimica Acta 2014 Volume 145() pp:327-334
Publication Date(Web):1 November 2014
DOI:10.1016/j.electacta.2014.09.018
•Li3VO4/natural graphite is fabricated via a quasi sol gel method.•The fabrication method is facile and low cost.•The Li3VO4/natural graphite electrode shows excellent cycle stability and rate capability.Li3VO4 nanoparticles with mean size about 100 nm are uniformly deposited on the surface of natural graphite via a quasi sol gel method. The electrochemical performance of the Li3VO4/natural graphite composite as anode for lithium ion batteries is studied via galvanostatic battery testing, which shows excellent cycle stability and rate capability. At a specific current of 156 mA g−1, it delivers discharge and charge capacity of 579 and 427 mAh g−1 in the initial cycle, which maintain of 469 and 468 mAh g−1 after 100 cycles. After 60 cycles at various specific currents from 234 to 11,719 mA g−1, the discharge capacity can restore to 450 mAh g−1 when reverting the discharge/charge current to 234 mA g−1. It is demonstrated that natural graphite has important effect on the electrochemcial performance of the composite electrode, and an appropriate amount of natural graphite is beneficial to reduce the charge transfer resistance and maintain stable charge transfer process in cycling.
Co-reporter:Hua-Chao Tao, Xue-Lin Yang, Lu-Lu Zhang, Shi-Bing Ni
Journal of Electroanalytical Chemistry 2014 Volume 728() pp:134-139
Publication Date(Web):15 August 2014
DOI:10.1016/j.jelechem.2014.07.004
•SnS/graphene nanocomposite has been fabricated by one-step and in-situ method.•The graphene offers a continuous electrically conductive network.•The SnS/graphene nanocomposite exhibits excellent lithium storage performance.SnS/graphene nanocomposite has been prepared through a simple one-step and in situ method using thiourea as the sulfur source and reducing agent. The formation of SnS nanoparticles and the reduction of graphene oxide occur simultaneously during the hydrothermal process. The SnS nanoparticles are dispersed uniformly on graphene nanosheets and the SnS/graphene nanocomposite exhibits a relatively high reversible capacity and good cycling stability. The excellent electrochemical performance can be attributed to graphene, which prevents the agglomeration of SnS nanoparticles and improves the electronic conductivity of overall nanocomposite. The SnS/graphene nanocomposite combines the advantages of the good cycling stability of graphene and the high capacity of SnS nanoparticles.
Co-reporter:Hua-Chao Tao, Xue-Lin Yang, Lu-Lu Zhang, Shi-Bing Ni
Journal of Physics and Chemistry of Solids 2014 Volume 75(Issue 11) pp:1205-1209
Publication Date(Web):November 2014
DOI:10.1016/j.jpcs.2014.06.010
•CuS/graphene composite has been fabricated by one-pot and in-situ method.•The graphene offers a continuous electrically conductive network.•The CuS/graphene composite exhibits good lithium storage performance.CuS/graphene composite has been synthesized by the one-pot hydrothermal method using thiourea as the sulfur source and reducing agent. The formation of CuS nanoparticles and the reduction of graphene oxide occur simultaneously during the hydrothermal process, which enables a uniform dispersion of CuS nanoparticles on the graphene nanosheets. The electrochemical performance of CuS/graphene composite was studied as anode materials for lithium ion batteries. The obtained CuS/graphene composite exhibits a relative high reversible capacity and good cycling stability. The good electrochemical performance of CuS/graphene composite can be attributed to graphene, which improves the electronic conductivity of composite and enhances the interfacial stability of electrode and electrolyte.
Co-reporter:Shibing Ni, Jianjun Ma, Xiaohu Lv, Xuelin Yang, Lulu Zhang
Materials Letters 2014 Volume 124() pp:264-266
Publication Date(Web):1 June 2014
DOI:10.1016/j.matlet.2014.03.057
•We fabricated NaNiF3/Ni composite via a novel electrochemical corrosion method.•The electrochemical performance of the NaNiF3/Ni as anode was firstly studied.•NaNiF3/Ni shows obvious voltage plateau in charge/discharge curves.NaNiF3/Ni composite material is successfully synthesized by a novel electrochemical corrosion method. The morphology and size of the as-prepared composite material are studied by field emission scanning electron microscopy (FE-SEM). The results indicate that the NaNiF3 shows particle-like morphology with mean size about 3 μm, which grows directly on the surface of Ni foam. Electrochemical properties of the NaNiF3/Ni as anode for lithium ion batteries are studied by conventional charge/discharge test, which show obvious voltage plateaus in charge/discharge curves, endowing it with potential application in lithium ion battery.NaNiF3/Ni composite (a) is successfully grown on Ni foam (b) via a novel electrochemical corrosion method.
Co-reporter:Hua-Chao Tao, Xue-Lin Yang, Lu-Lu Zhang, Shi-Bing Ni
Materials Chemistry and Physics 2014 Volume 147(Issue 3) pp:528-534
Publication Date(Web):15 October 2014
DOI:10.1016/j.matchemphys.2014.05.026
•Chemically activated graphene encapsulated porous Si composite was prepared.•The graphene offers a continuous electrically conductive network.•The porous structure can accommodate volume expansion of Si-based materials.•The composite exhibits excellent lithium storage performance.Chemically activated graphene/porous Si@SiOx (CAG/Si@SiOx) composite has been synthesized via magnesiothemic reduction of mesoporous SiO2 (MCM-48) to porous Si@SiOx and dispersing in the suspension of chemically activated graphene oxide (CAGO) followed by thermal reduction. The porous Si@SiOx particles are well encapsulated in chemically activated graphene (CAG) matrix. The resulting CAG/Si@SiOx composite exhibits a high reversible capacity and excellent cycling stability up to 763 mAh g−1 at a current density of 100 mA g−1 after 50 cycles. The porous structure of CAG layer and Si@SiOx is beneficial to accommodate volume expansion of Si during discharge and charge process and the interconnected CAG improves the electronic conductivity of composite.
Co-reporter:Jianjun Ma, Shibing Ni, Xiaohu Lv, Xuelin Yang, Lulu Zhang
Materials Letters 2014 Volume 133() pp:94-96
Publication Date(Web):15 October 2014
DOI:10.1016/j.matlet.2014.06.144
•We fabricated a new Ni5P4/Ni composite via a chemical corrosion method.•The electrochemical performance of Ni5P4/Ni as anode was studied for the first time.•Ni5P4/Ni shows obvious voltage plateaus in charge/discharge curves.The chemical corrosion of red phosphorus on Ni foam is studied, which leads to the growth of Ni5P4 on the surface of Ni foam. The morphology and size of the as-prepared Ni5P4 are studied by field-emission scanning electron microscopy (FE-SEM), which indicate that the Ni5P4 is composed of particles with a mean size of about 500 nm and microflowers with a mean size of about 10 μm. The electrochemical property of Ni5P4/Ni as anode for lithium ion batteries is studied by conventional charge/discharge test, which shows obvious voltage plateaus in charge/discharge curves, endowing it with potential application in lithium ion batteries.Ni5P4 is successfully grown on Ni foam via a novel chemical corrosion method.
Co-reporter:Hua-Chao Tao;Lu-Lu Zhang;Shi-Bing Ni
Ionics 2014 Volume 20( Issue 11) pp:1547-1552
Publication Date(Web):2014 November
DOI:10.1007/s11581-014-1138-8
Double-walled core-shell structured Si@SiO2@C nanocomposite has been prepared by calcination of silicon nanoparticles in air and subsequent carbon coating. The obtained Si@SiO2@C nanocomposite demonstrates a reversible specific capacity of about 786 mAh g−1 after 100 cycles at a current density of 100 mA g−1 with a capacity fading of 0.13 % per cycle. The enhanced electrochemical performance can be due to that the double walls of carbon and SiO2 improve the electronic conductivity and enhance the compatibility of electrode materials and electrolyte as a result of accommodating the significant volumetric change during cycles. The interlayer SiO2 may release the mechanical strain and enhance the interfacial adhesion between carbon shell and silicon core.
Co-reporter:Shibing Ni, Xiaohu Lv, Tao Li, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2013 vol. 1(Issue 5) pp:1544-1547
Publication Date(Web):10 Dec 2012
DOI:10.1039/C2TA01191C
Ni(OH)2 nanowalls were prepared via a novel hydrothermal method, which show excellent cycling stability as anodes for Li-ion batteries. The initial discharge and charge capacities are 0.63 and 0.49 mA h cm−2, respectively, showing no evident capacity attenuation over 100 cycles.
Co-reporter:Lu-Lu Zhang, Song Duan, Xue-Lin Yang, Gang Peng, Gan Liang, Yun-Hui Huang, Yan Jiang, Shi-Bing Ni, and Ming Li
ACS Applied Materials & Interfaces 2013 Volume 5(Issue 23) pp:12304
Publication Date(Web):November 6, 2013
DOI:10.1021/am402434n
Reduced graphene oxide modified Li2FeSiO4/C (LFS/(C+rGO)) composite is successfully synthesized by a citric-acid-based sol–gel method and evaluated as cathode material for lithium ion batteries. The LFS/(C+rGO) shows an improved electronic conductivity due to the conductive network formed by reduced graphene oxide nanosheets and amorphous carbon in particles. Electrochemical impedance spectroscopy results indicate an increased diffusion coefficient of lithium ions (2.4 × 10–11 cm2 s–1) for LFS/(C+rGO) electrode. Compared with LFS with only amorphous carbon, the LFS/(C+rGO) electrode exhibits higher capacity and better cycling stability. It delivers a reversible capacity of 178 mAh g–1 with a capacity retention ratio of 94.5% after 40 cycles at 0.1 C, and an average capacity of 119 mAh g–1 at 2 C. The improved performance can be contributed to the reduced crystal size, good particle dispersion, and the improved conductive network between LFS particles.Keywords: cathode material; electrochemical performance; Li2FeSiO4; lithium ion battery; reduced graphene oxide;
Co-reporter:Shibing Ni, Xiaohu Lv, Tao Li, Xuelin Yang, Lulu Zhang
Electrochimica Acta 2013 Volume 109() pp:419-425
Publication Date(Web):30 October 2013
DOI:10.1016/j.electacta.2013.07.088
•We prepared Cu2O–Cu composite architecture via an electrochemical corrosion method.•We explored the utilization of electrochemical corrosion of metal in Li-ion batteries.•The obtained Cu2O–Cu electrode shows excellent cycle stability and rate capability.•The effect of corrosion condition on electrochemical performance of Cu2O–Cu was studied.Cu2O was directly grown on Cu foam via a facile electrochemical corrosion method by the aid of H2O2. Galvanostatic battery testing shows that the Cu2O–Cu electrode exhibits excellent cycle stability and rate capability. It delivers charge and discharge capacity about 0.76 mA h cm−2 without attenuation over 100 cycles under a charge/discharge rate of 0.15 C. After testing at various rates from 0.2 to 35 C over 60 cycles, the 5th-cycle discharge capacity can resume 98.9% when lowering the charge/discharge rate to 0.2 C. The performances are due to both the fine electric contact between Cu2O and Cu foam and a possible porous architecture of Cu2O electrode. The electrochemical reaction kinetic of Cu2O–Cu electrode was studied by cyclic voltammetry measurement at various scan rate, which indicates the anodic and cathodic peak currents show linear dependence on the square root of scan rate from 0.1 to 3 mV s−1, suggesting a lithium ion diffusion controlled mechanism in the charge/discharge process.
Co-reporter:Shibing Ni, Xiaohu Lv, Tao Li, Xuelin Yang, Lulu Zhang, Yong Ren
Electrochimica Acta 2013 Volume 96() pp:253-260
Publication Date(Web):30 April 2013
DOI:10.1016/j.electacta.2013.02.106
Novel massif-like CuxO nanostructure was directly growing on Cu foam via a facile thermal oxidation method in air atmosphere. The massifs are about 5 μm in mean diameter and 4 μm in mean height, which consist of a large number of nanoparticles with mean size about 100 nm. CuxO nanowires that evolve from the particles locate at the laps of the massifs. Galvanostatic battery testing shows that the CuxO/Cu electrode exhibits excellent cycle stability and rate capability. The charge and discharge capacities are both 1.8 mAh cm−2 after 100 cycles under a discharge/charge rate of 0.35 C. After testing at various rates from 0.2 to 12 C over 50 cycles, the 5th-cycle discharge capacity can resume well when lowering the discharge/charge rate to 0.2 C. The performances are testified due to a novel electrochemical activation effect that induces the reconstruction of porous forest-like morphology in cycling.
Co-reporter:Shibing Ni, Tao Li, Xiaohu Lv, Xuelin Yang, Lulu Zhang
Electrochimica Acta 2013 Volume 91() pp:267-274
Publication Date(Web):28 February 2013
DOI:10.1016/j.electacta.2012.12.113
Porous NiO/Ni foam electrode is fabricated by a simple two-step method. Firstly, nickel hydroxide hydrate nanoflakes are deposited on Ni foam via a chemical liquid deposition (CLD) method. Then NiO/Ni architecture is obtained by subsequent graft growth in air atmosphere at 350 °C. Galvanostatic battery testing shows that NiO electrode exhibits fine capacity retention and good rate performance. It exhibits high initial discharge and charge capacity of 1.94 and 1.36 mAh cm−2, maintaining of 1.41 and 1.38 mAh cm−2 after 140 cycles under a discharge/charge rate of 0.4 C. It delivers high discharge capacity retention of 70% (comparing with that of 0.2 C) even at a high rate of 2.5 C. After that, the discharge capacity can gradually resume along with the decrease of discharge/charge rate, showing capacity retention of 105% when lowering the discharge/charge rate to 0.2 C. The fine electrochemical performance of NiO/Ni is due to the maintenance of porous architecture and the prevention of active nano-sized NiO from aggregation in cycling, which is relevant to both the interweaved structure of NiO nanoflakes and the graft growth between NiO and Ni.
Co-reporter:Shibing Ni, Xiaohu Lv, Tao Li, Xuelin Yang
Materials Chemistry and Physics 2013 Volume 143(Issue 1) pp:349-354
Publication Date(Web):16 December 2013
DOI:10.1016/j.matchemphys.2013.09.008
•Preparation of Cu2S on Cu foam via a novel dry thermal sulfuration method.•Cu2S/Cu is used as electrode for Li-ion battery.•Cu2S/Cu electrode shows no capacity attenuation at 0.25 C in 100 cycles.•The electrode can restore 97.8% capacity even undergoing 140 cycles up to 60 C.Cu2S film that directly grows on porous Cu foam has been fabricated by a novel dry thermal sulfuration approach. The crystalline structure and morphological observation of the as-synthesized Cu2S/Cu were characterized by X-Ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM), respectively. The electrochemical performance of the Cu2S/Cu as cathode for Li-ion battery was studied by charge/discharge test and cyclic voltammetry (CV) measurement. The results indicate that the Cu2S/Cu cathode exhibits excellent cycle stability and rate capability. When applying a charge/discharge rate of 0.25 C, it delivers initial discharge and charge capacity of 0.74 and 0.40 mAh cm−2, respectively. After 100 cycles, the discharge and charge capacity are both 0.41 mAh cm−2, showing no obvious capacity attenuation. Besides, even after 140 cycles at various rates from 0.3 C to 60 C, the discharge capacity of the Cu2S/Cu cathode can restore 97.8% when lowering the charge/discharge rate to 0.3 C.
Co-reporter:Shibing Ni, Xuelin Yang and Tao Li
Journal of Materials Chemistry A 2012 vol. 22(Issue 6) pp:2395-2397
Publication Date(Web):03 Jan 2012
DOI:10.1039/C2JM15394G
A novel dry thermal sulfuration approach has been used to fabricate a porous NiS/Ni nanostructured cathode electrode. Galvanostatic battery testing shows that the NiS/Ni electrode exhibits high discharge/charge capacity and excellent cycle performance. The performances are due to its favorable porous structure and the fine electrical contact between NiS and Ni.
Co-reporter:Xuelin Yang, Fei Mou, Lulu Zhang, Gang Peng, Zhongxu Dai, Zhaoyin Wen
Journal of Power Sources 2012 Volume 204() pp:182-186
Publication Date(Web):15 April 2012
DOI:10.1016/j.jpowsour.2011.12.032
The electrochemical performance of LiFePO4/C samples synthesized by different carbon sources varies considerably, the structural difference of residual carbon in LiFePO4/C accounts for the performance variation. Higher performance is associated with a larger ratio of graphitic carbon, which exhibits better electronic conductivity than amorphous carbon. To improve the electronic conductivity, we prepared LiFePO4/(C+G) composites by a one-step solid-state method, in which natural graphite is used as reducing agent and conducting additives. The samples were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), Raman microprobe spectroscope and other electrochemical methods. The results show that reversible capacity and rate performance of LiFePO4 are improved considerably by the two-phase carbon coating. Therefore, LiFePO4/(C+G) composites are a promising candidate for lithium ion batteries.Highlights► High rate-performance of LiFePO4/(C+G) cathode material with amorphous carbon and nano-graphite. ► Fe2O3 was successfully reduced to LiFePO4 by activated natural graphite. ► LiFePO4/(C+G) shows a high discharge capacity of 167.0 mAh g−1 at 0.2C, and excellent rate capacity of 91.1 mAh g−1 and 60.4 mAh g−1 at 10C and 60C. ► The excellent rate-performance is due to the impact graphite coating on the surface of LiFePO4 particles.
Co-reporter:Shibing Ni, Tao Li, Xuelin Yang
Thin Solid Films 2012 Volume 520(Issue 21) pp:6705-6708
Publication Date(Web):31 August 2012
DOI:10.1016/j.tsf.2012.06.074
Cu2S film electrode direct growth on Cu foil is prepared by a simple hydrothermal approach. The electrochemical properties of the as-prepared Cu2S electrode are investigated via conventional discharge and charge tests. When applying a current density of 0.1 mA cm− 2, the as-prepared Cu2S electrode exhibits discharge and charge capacity of 0.27, 0.32, 0.35, 0.34 and 0.34 mAh cm− 2 at the 100th, 200th, 300th, 400th and 500th cycle, respectively. Such good performance of the as-prepared Cu2S electrode is attributed to the fine electric contact between Cu2S and Cu foil and the possible hollow structure of Cu2S film.Highlights► Direct growth of Cu2S film on Cu foil for lithium ion batteries. ► Direct growth leads to fine electronic contact between Cu2S film and Cu foil. ► Cu2S film shows possible hollow architecture. ► Cu2S film as anode for lithium ion battery leads to excellent cycling performance.
Co-reporter:Shibing Ni, Tao Li, Xuelin Yang
Materials Letters 2011 Volume 65(17–18) pp:2662-2664
Publication Date(Web):September 2011
DOI:10.1016/j.matlet.2011.05.065
Cobalt vanadium oxide hydroxide hydrate (Co3(OH)2V2O7·nH2O) nanosheets are successfully synthesized by a simple hydrothermal method. The composition of Co3(OH)2V2O7·nH2O is studied by thermal gravity (TG) analysis in N2 atmosphere and subsequent X-ray powder diffraction (XRD) characterization of the sample obtained via annealing Co3(OH)2V2O7·nH2O nanosheets in N2 atmosphere at 800 °C for 6 h. The results indicate that there are 1.7 water molecules in a Co3(OH)2V2O7·nH2O molecular formula. Electrochemical properties of Co3(OH)2V2O7·1.7H2O nanosheets as negative electrode of lithium ion batteries are studied by conventional charge/discharge test, which show an initial capacity of 730 mAh g−1 with steady plateau near 0.9 V at a current density of 0.05 mA cm−2.
Co-reporter:Shibing Ni, Xuelin Yang, Tao Li
Materials Letters 2011 Volume 65(Issue 4) pp:766-768
Publication Date(Web):28 February 2011
DOI:10.1016/j.matlet.2010.11.056
Well-crystallized strontium carbonate (SrCO3) nanoparticles were successfully synthesized by a simple hydrothermal method. The products were characterized by X-ray diffraction (XRD), which is in good agreement with orthorhombic SrCO3. Raman spectrum is in accordance with its crystal structure. Field emission scanning electron microscopy (FE-SEM) characterization indicates that the as-synthesized SrCO3 nanoparticles are of mean size about 80 nm. The band gap of SrCO3 was estimated by Wood and Tauc method through UV–visible reflection spectrum, showing a band gap value of 3.17 eV (391 nm). The photoluminescence properties of the as-synthesized SrCO3 were measured at room temperature, which shows excellent emissions with two emission centers ranging from ultraviolet to red. The ultraviolet emission center locates at 390 nm, and the green emission center locates at 523 nm, respectively.
Co-reporter:Xuelin Yang, Pengchang Zhang, Zhaoyin Wen, Lulu Zhang
Journal of Alloys and Compounds 2010 Volume 496(1–2) pp:403-406
Publication Date(Web):30 April 2010
DOI:10.1016/j.jallcom.2010.02.035
Silicon/carbon composite was prepared by an in situ carbon-thermal reduction method that used pyrolyzed carbon to reduce silicon monoxide. The composite was confirmed by X-ray diffraction and high-resolution transmission electron microscope. It was demonstrated that nano-scale (ca. 20 nm) crystal silicon particles were obtained and simultaneously distributed in amorphous carbon matrix. Compared with the silicon/carbon composite having commercial nano-silicon particles (50–100 nm), the as-prepared composite displayed a good capacity retention. The superior electrochemical properties were attributed not only to small volume changes of silicon particles, but also to better buffering effect of matrix and better electrical contact between the matrix and silicon particles.
Co-reporter:Lulu Zhang, Gang Peng, Xuelin Yang, Pengchang Zhang
Vacuum 2010 Volume 84(Issue 11) pp:1319-1322
Publication Date(Web):4 June 2010
DOI:10.1016/j.vacuum.2010.02.011
LiFePO4/C with smaller particle size (0.3–0.6 μm) was synthesized via a two-step vacuum sintering method. X-ray diffraction and scanning electron microscopy were used to detect the phases presented in the composites and observe sample morphology. In addition, AC electrochemical impedance spectroscopy, cyclic voltammetry, along with constant current discharge/charge tests, were used to characterize the electrochemical properties of the composites. It was shown that LiFePO4/C with a single olive crystal structure could deliver discharge capacity of 145.5 and 108.7 mAh g−1 at 0.5 and 6C for the fist cycle, and kept reversible capacity of 147.5 and 117.1 mAh g−1 after 100 cycles.
Co-reporter:Xuelin Yang, Zhaoyin Wen, Lulu Zhang, Min You
Journal of Alloys and Compounds 2008 Volume 464(1–2) pp:265-269
Publication Date(Web):22 September 2008
DOI:10.1016/j.jallcom.2007.09.088
A novel nano-Si dispersed composite containing lithium-rich component (lithium orthosilicate, etc.) has been prepared and investigated as a potential anode material for lithium-ion batteries. The composite was synthesized by mechanochemical reduction of SiO using lithium metal as reducing agent and graphite as grinding aid, further vacuum heat-treatment was performed to improve interfacial stability between different components. Compared with pure SiO and intrinsic silicon electrodes, the as-obtained composite electrode exhibited greatly improved cycling performance with a remarkable value of the first coulombic efficiency. The superior electrochemical properties were attributed to small absolute volume changes of nano-silicon particles, highly distribution of silicon phase and better buffering action of lithium-containing components.
Co-reporter:Lu-Lu Zhang, Zhen Li, Xue-Lin Yang, Xiao-Kai Ding, Ying-Xian Zhou, Hua-Bin Sun, Hua-Chao Tao, Ling-Yun Xiong, Yun-Hui Huang
Nano Energy (April 2017) Volume 34() pp:
Publication Date(Web):April 2017
DOI:10.1016/j.nanoen.2017.02.026
•Binder-free Li3V2(PO4)3/C membrane electrode supported on 3D N-doped carbon fibers was in-situ fabricated.•Glucose and filter paper were used as double carbon sources.•N-doped carbon fibers decomposed from filter paper function as current collector.•Outstanding rate capability and cycle performance are attained.An in-situ prepared binder-free Li3V2(PO4)3/C membrane electrode supported on 3D N-doped carbon fibers (LVP/C@NCF) has been developed. The residual carbon in LVP/C@NCF consists of the pyrolytic carbon from glucose and the N-doped carbon fibers decomposed from filter paper. The former uniformly covers on the surface of LVP particles, while the latter is functioned as both a 3D conductive network and a current collector for LVP. Compared with the traditional LVP/C electrode supported on Al foil (LVP/C@Al), the LVP/C@NCF membrane electrode displays higher rate capability and better cycle stability. Especially, when cycled at a high rate of 10 C, it still delivers a specific capacity as high as 107.6 mA h g−1 with a very low capacity fading ratio of ~0.0048% per cycle after 1000 cycles. The excellent electrochemical performance is ascribed to the synergetic effect from the 3D effectively conductive network and the in-situ produced current collector of carbon fibers. The method of using filter paper as the source of carbon and current collector to prepare integrated membrane electrode may provide feasible and effective strategy to fabricate binder-free flexible and lightweight lithium ion batteries as well as sodium ion batteries.
Co-reporter:Jun Tang, Shibing Ni, Qichang Chen, Wensheng Han, Xuelin Yang, Lulu Zhang
Materials Letters (15 May 2017) Volume 195() pp:
Publication Date(Web):15 May 2017
DOI:10.1016/j.matlet.2017.02.125
•The design of hierarchically porous architecture of NiO-Ni as anode for SIBs.•Triple improving the electronic conductivity, sodium ion diffusion and structure stability.•Prominent performance in half cell and full cell.NiO nanowalls with mean diameter of 300 nm and mean thickness of 30 nm have been successfully grown on Ni foam via an electrochemical corrosion approach and subsequent sintering. The NiO-Ni shows superior electrochemical performance as anode for sodium ion batteries owing to the morphological and architectural advantages. It delivers high charge/discharge capacity of 491/501 mAh g−1 after 100 cycles at specific capacity of 300 mAh g−1 in a half cell. When matching with a Na3V2(PO4)3 cathode, it can also deliver charge/discharge capacity of 103/108 mAh g−1 after 50 cycles.
Co-reporter:Ying-Xian Zhou, Lu-Lu Zhang, Xue-Lin Yang, Yun-Hui Huang, Xiao-Kai Ding, Di Ma, Ji-Qing Wang
Ceramics International (1 February 2017) Volume 43(Issue 2) pp:
Publication Date(Web):1 February 2017
DOI:10.1016/j.ceramint.2016.11.018
Recently, Na3V2(PO4)3 has shown great promise as cathode material for sodium-ion batteries. In this study, a series of carbon-modified Na3V2(PO4)3 (NVP/C) composites have been synthesized using anthracite as the carbon source. The NVP/C composite shows a nanosheet shape with a 3D continuously conductive network composed of carbon layer and carbon bump. The effect of anthracite dosage on the electrochemical performance of NVP/C has also been investigated. The results show that the NVP/C composite prepared with 10 wt% anthracite (NVP/C-10) exhibits the highest rate capability and a great cycle stability. Especially the NVP/C-10 electrode behaves an average capacity as high as 97 mAh g−1 at a high current rate of 10 C. Moreover, NVP/C-10 still delivers a high specific capacity of 97.5 mAh g−1 even after 800 cycles at 5 C, showing a very low capacity fading ratio of 0.012% per cycle. The excellent rate capability and cycle stability of NVP/C-10 can be ascribed to the synergistic effects of the nanosheet structure and the 3D continuously conductive network. Our results demonstrate that anthracite can be a promising carbon source for the preparation of NVP/C and other polyanion cathode materials as well.
Co-reporter:Hua-Bin Sun, Ying-Xian Zhou, Lu-Lu Zhang, Xue-Lin Yang, Xing-Zhong Cao, Hanu Arave, Hui Fang and Gan Liang
Physical Chemistry Chemical Physics 2017 - vol. 19(Issue 7) pp:NaN5162-5162
Publication Date(Web):2017/01/13
DOI:10.1039/C6CP07760A
Li3V2(PO4)3/C (LVP/C) composites have been modified by different ways of Zr-incorporation via ultrasonic-assisted solid-state reaction. The difference in the effect on the physicochemical properties and the electrochemical performance of LVP between Zr-doping and ZrO2-coating has also been investigated. Compared with pristine LVP/C, Zr-incorporated LVP/C composites exhibit better rate capability and cycling stability. In particular, the LVP/C-Zr electrode delivers the highest initial capacity of 150.4 mA h g−1 at 10C with a capacity retention ratio of 88.4% after 100 cycles. The enhanced electrochemical performance of Zr-incorporated LVP/C samples (LVZrP/C and LVP/C-Zr) is attributed to the increased ionic conductivity and electronic conductivity, the improved stability of the LVP structure, and the decreased charge-transfer resistance.
Co-reporter:Hua-Bin Sun, Ying-Xian Zhou, Lu-Lu Zhang, Xue-Lin Yang, Xing-Zhong Cao, Hanu Arave, Hui Fang and Gan Liang
Physical Chemistry Chemical Physics 2017 - vol. 19(Issue 7) pp:NaN5162-5162
Publication Date(Web):2017/01/13
DOI:10.1039/C6CP07760A
Li3V2(PO4)3/C (LVP/C) composites have been modified by different ways of Zr-incorporation via ultrasonic-assisted solid-state reaction. The difference in the effect on the physicochemical properties and the electrochemical performance of LVP between Zr-doping and ZrO2-coating has also been investigated. Compared with pristine LVP/C, Zr-incorporated LVP/C composites exhibit better rate capability and cycling stability. In particular, the LVP/C-Zr electrode delivers the highest initial capacity of 150.4 mA h g−1 at 10C with a capacity retention ratio of 88.4% after 100 cycles. The enhanced electrochemical performance of Zr-incorporated LVP/C samples (LVZrP/C and LVP/C-Zr) is attributed to the increased ionic conductivity and electronic conductivity, the improved stability of the LVP structure, and the decreased charge-transfer resistance.
Co-reporter:Shibing Ni, Jianjun Ma, Jicheng Zhang, Xuelin Yang and Lulu Zhang
Chemical Communications 2015 - vol. 51(Issue 27) pp:NaN5882-5882
Publication Date(Web):2015/03/02
DOI:10.1039/C5CC00486A
A novel in situ electrochemical reconstruction occurs in NiV3O8/natural graphite electrodes, which results in excellent electrochemical performance. After repeated rate performance from 0.16 to 3.1 A g−1 over 320 cycles, the specific capacity can restore well and shows no obvious attenuation in the subsequent 360 cycles.
Co-reporter:Shibing Ni, Jianjun Ma, Xiaohu Lv, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2014 - vol. 2(Issue 48) pp:NaN20509-20509
Publication Date(Web):2014/11/10
DOI:10.1039/C4TA03871A
Porous Cu3P/Cu anode was prepared, which shows good electrochemical performance because of a novel electrochemical reconstruction in cycling. The compatible voltage plateau, specific capacity and density of Cu3P suggest that it can be an ideal high energy density anode for Li-ion batteries.
Co-reporter:Jianjun Ma, Shibing Ni, Jicheng Zhang, Xuelin Yang and Lulu Zhang
Physical Chemistry Chemical Physics 2015 - vol. 17(Issue 33) pp:NaN21447-21447
Publication Date(Web):2015/07/29
DOI:10.1039/C5CP03435C
The charge/discharge mechanism of CuV2O6 as the anode for Li-ion batteries is studied for the first time, suggesting a phase transition in discharging, which initially involves the formation of LiV2O5 and Cu3V2O8, the subsequent transition from Cu3V2O8 to LixV2O5 and CuO, the insertion of lithium ions into LiV2O5, and later the reduction of CuO into Cu. The phase transition of Cu3V2O8 is accompanied by an amorphization process, which is maintained in the subsequent discharging and charging processes. The CuV2O6/natural graphite electrode with a sodium alginate binder is prepared, which shows superior electrochemical performance. At a specific current of 110 mA g−1, it delivers initial discharge and charge capacities of 725 and 453 mA h g−1, respectively, maintaining 537 and 533 mA h g−1 after 200 cycles.
Co-reporter:Shibing Ni, Xuelin Yang and Tao Li
Journal of Materials Chemistry A 2012 - vol. 22(Issue 6) pp:
Publication Date(Web):
DOI:10.1039/C2JM15394G
Co-reporter:Shibing Ni, Xiaohu Lv, Tao Li, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2013 - vol. 1(Issue 5) pp:NaN1547-1547
Publication Date(Web):2012/12/10
DOI:10.1039/C2TA01191C
Ni(OH)2 nanowalls were prepared via a novel hydrothermal method, which show excellent cycling stability as anodes for Li-ion batteries. The initial discharge and charge capacities are 0.63 and 0.49 mA h cm−2, respectively, showing no evident capacity attenuation over 100 cycles.
Co-reporter:Shibing Ni, Jicheng Zhang, Jianjun Ma, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2015 - vol. 3(Issue 35) pp:NaN17955-17955
Publication Date(Web):2015/08/13
DOI:10.1039/C5TA04402B
A high performance Li3VO4/N-doped C anode was successfully prepared, which delivers an initial discharge/charge capacity of 600/472 mA h g−1 at 150 mA g−1, maintaining 462/460 mA h g−1 after 100 cycles. It shows no capacity attenuation over 2200 cycles at 2000 mA g−1, delivering a discharge/charge capacity of 267/264 mA h g−1.
Co-reporter:Shibing Ni, Jianjun Ma, Xiaohu Lv, Xuelin Yang and Lulu Zhang
Journal of Materials Chemistry A 2014 - vol. 2(Issue 24) pp:NaN8998-8998
Publication Date(Web):2014/05/13
DOI:10.1039/C4TA00380B
A NiV3O8/Ni composite was successfully prepared via a novel in situ corrosion method, which shows good electrochemical performance as a new sort of anode for Li-ion batteries. After 60 cycles at various rates from 0.1 to 20 C, the discharge capacity can be restored when the charge–discharge rate is lowered to 0.1 C.
