Electrochemical Performance of the Li₃V₂(PO₄)₃/C Synthesized from V₂O₃

Abstract:

Li₃V₂(PO₄)₃/C with monoclinic structure were prepared respectively by V₂O₅ and low valence vanadium oxide V₂O₃ via solid state reaction. The structure, particle size and morphology of the powders were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed the pure phase Li₃V₂(PO₄)₃ with the highest performance can be synthesized at 750 degree by using V₂O₃ vanadium source. The capacity retention had nearly 100% after 40-cycles at 0.5 C. It has relative capacity retention and higher specific capacity, comparing with V₂O₅ vanadium source at the optimal synthesis temperature. The electrochemical impedance spectra (EIS) manifests the capacity degradation was mainly caused by the increased solution impedance and electrochemical impedance.

• Periodical: Key Engineering Materials (Volume 519)
• Pages: 142-146
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.519.142
• Online since: July 2012
• Authors: Ai Fang Liu, Zhou Lan Yin
• Keywords: Carbon Coating, Lithium Vanadium Phosphate (Li₃V₂(PO₄)₃), Lithium-Ion Battery, Solid-State Reaction

References

[1] V. Drozda, G.Q. Liu, R.S. Liu, et al., Synthesis, electrochemical properties, and characterization of LiFePO4/C composite by a two-source method, J. Alloys Compd. 487 (2009) 58-63.

[2] X. D. Yan, G.L. Yang, J. Liu, et al., An effective and simple way to sythesize LiFePO4/C composite, Electrochimi. Acta 54 (2009) 5770-5774.

DOI: 10.1016/j.electacta.2009.05.048

[3] H.P. Liu, Z.X. Wang, X.H. Li, et al., Synthesis and electrochemical properties of olivine LiFePO4 prepared by a carbothermal reduction method, J. Power Sources 184 (2008) 469-472.

DOI: 10.1016/j.jpowsour.2008.02.084

[4] H.C. Shin, W.I. Cho, H. Jang, Electrochemial properties of carbon-coated LiFePO4 cathode using graphite, carbon black, and acetylene black, J. Electrochimi. Acta 52 (2006) 1472-1476.

DOI: 10.1016/j.electacta.2006.01.078

[5] M.S. Bhuvaeswari, N.N. Bramnik, D. Ensling, Synthesis and characterization of Carbon Nano Fiber/LiFePO4 composites for Li-ion batteries, J. Power Sources 180 (2008) 553-560.

DOI: 10.1016/j.jpowsour.2008.01.090

[6] X.D. Guo, B.H. Zhong, H. Liu, The preparation of LiFePO4/C cathode by a modified carbon-coated method, J. Electrochem. Soc. 156 (2009) A787-A790.

[7] C.S. Sun, Z. Zhou, Z.G. Xu, Improved high-rate charge/discharge performances of LiFePO4/C via V-doping, J. Power Sources 193 (2009) 841-845.

DOI: 10.1016/j.jpowsour.2009.03.061

[8] H. Liu, Q. Cao, L.J. Fu, Doping effects of zinc on LiFePO4 cathode material for lithium ion batteries, J. Electrochem. Commun. 8 (2006) 1553-1557.

DOI: 10.1016/j.elecom.2006.07.014

[9] D. Wang, H. Li, S. Shi, Improving the rate performance of LiFePO4 by Fe-site doping, J. Electrochimi. Acta 50 (2005) 2955-2958.

DOI: 10.1016/j.electacta.2004.11.045

[10] J. Xu, G. Chen, Y.J. Teng, Electrochemical properties of LiAlxFe1-3xPO4/C prepared by a solution method, J. Solid State Commun. 147 (2009) 414-418.

[11] J.J. Chen, X. Jia, Q.J. She, et al., The preparation of nano-sulfur/MWCNTs and its electrochemical performance, J. Electrochimi. Acta, 55 (2010) 8062-8066.

DOI: 10.1016/j.electacta.2010.01.069

[12] J. Bark, M.Y. Saidi, J.L. Swolyer, A carbothermal reduction method for the preparation of electroactive materials for lithium on applications, J. Electrochem. Soc. 150 (2003) A684-A688.

DOI: 10.1149/1.1568936

[13] M.Y. Saidi, J. Barker, H. Huang, Performance characteristics of lithium vanadium phosphate as a cathode materials for lithium-ion batteries, J. Power Sources, 119-121 (2003) 266-272.

DOI: 10.1016/s0378-7753(03)00245-3

[14] X.H. Rui, Y. Jin, X.Y. Feng, et al., A comparative study on the low-temperature performance of LiFePO4/C and cathodes for lithium-ion batteries, J. Power Sources 196 (2011) 2109-2114

DOI: 10.1016/j.jpowsour.2010.10.063

[15] M.Y. Saidi, J. Barker, H. Huang, Electrochemical properties of lithium vanadium phosphate as cathode materials for lithium-ion batteries, J. Electrochem. Solid State Lett. 5 (2002) A149-A151.

DOI: 10.1149/1.1479295

[16] S.Q. Liu, L.X. Tang, K.L. Huang, Preparation of cathode material Li3V2(PO4)3 by carbonthermal method, Chinese Journal of Power Source 30 (2006) 473-476.

[17] L.Y. Wang, X.C. Zhou, Y.L. Guo, Synthesis and performance of carbon-coated Li3V2(PO4)3 cathode materials by a low temperature solid-state reaction, J. Power Sources 195 (2010) 2844-2850.

DOI: 10.1016/j.jpowsour.2009.11.056

[18] J. Wang, X. Zhang, J. Liu, Long-term cyclability and high-rate capability of Li3V2(PO4)3/C cathode material using PVA as carbon source, J. Electrochimi. Acta 55 (2010) 6879-6884.

DOI: 10.1016/j.electacta.2010.05.077

[19] L. Wang, X. Jiang, X. Li, Rapid preparation and electrochemical behavior of carbon-coated Li3V2(PO4)3 from wet coordination, J. Electrochimi. Acta 55 (2010) 5057-5062.

DOI: 10.1016/j.electacta.2010.03.062

[20] C.S. Dai, F.P. Wang, J.T. Liu, Preparation and performance study of Li3V2(PO4)3 by sol-gel method, J. orga. Chem. 24 (2008) 381-387