Research Paper

Synthesis and Characterization of Composite Cathode Material xLiFePO4·yLi3V2(PO4)3

  • ZHENG Jun-Chao ,
  • LI Xin-Hai ,
  • WANG Zhi-Xing ,
  • QIN Dong-Mian ,
  • GUO Hua-Jun ,
  • PENG Wen-Jie
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  • School of Metallurgical Science and Engineering,Central South University, Changsha 410083, China

Received date: 2008-04-03

  Revised date: 2008-05-14

  Online published: 2009-01-20

Abstract

5LiFePO4·Li3V2(PO4)3 was synthesized via calcining amorphous 5LiFePO4·Li3V2(PO4)3 obtained through lithiation of FePO4·xH2O and V2O5 by using oxalic acid as a novel reducing agent at room temperature. The crystal structure, morphology and electrochemical properties of the products were investigated. The results show that the sample synthesized at 650℃ for 12h has fine particle sizes of 100-200nm with homogenous sizes distribution. Electrochemical measurement results indicate that the material exhibites high rate characteristic and high discharge capacity of 158mAh/g (theoretic capacity 156.8mAh/g) and 114mAh/g at 1C and 10C rate, respectively. There is no obvious capacity fade observed after 100 cycles at 10C rate. The electrochemical performance of composite cathode material 5LiFePO4·Li3V2(PO4)3 is better than that of individual cathode material, such as LiFePO4 and Li3V2(PO4)3.

Cite this article

ZHENG Jun-Chao , LI Xin-Hai , WANG Zhi-Xing , QIN Dong-Mian , GUO Hua-Jun , PENG Wen-Jie . Synthesis and Characterization of Composite Cathode Material xLiFePO4·yLi3V2(PO4)3[J]. Journal of Inorganic Materials, 2009 , 24(1) : 143 -146 . DOI: 10.3724/SP.J.1077.2009.00143

References

[1]Padhi A K, Nanjund Aswamy K S, Goodenough J B. J. Electrochem. Soc., 1997, 144(4):1188-1194.
[2]吴宇平,万春荣,姜长印. 锂离子二次电池.北京: 化学工业出版社, 2002: 56-58.
[3]Padhi A K, Nanjund Aswamy K S, Masquelier C, et al. J. Electrochem. Soc., 1997, 144(5):1609-1613.
[4]Morgan D, Ceder G, Saidi M Y. Chem. Mater., 2002, 14(3): 4 684-4 693.
[5]Huang H, Yin S C, Kerr T. Adv. Mater.,2002, 14(21):1525-1528.
[6]Liu H, Fu L J, Zhang H P, et al. Electrochem. Solid-State Lett., 2006, 9(12): A529 - A533.
[7]Liu H, Fu L J, Li C, et al. Electrochem. Commun.,2006, 8(10):1553-1557.
[8]Zheng J C, Li X H, Wang Z X, et al. J.Power Sources,2008,184(2):574-577.
[9]Yang M R, Wu K, Wu S H. J. Power Sources,2007, 165(2):646-650.
[10]Wang L N, Li Z C, Xu H J, et al. J. Phys. Chem.C, doi: 10.1021/jp0758014.
[11]Chung S Y, Bloking J T, Chiang Y M. Nat. Mater.,2002, 1(2): 123-128.
[12]Hu G R, Gao X G, Peng Z D, et al. Trans. Nonferrous Met. Soc. China,2007, 17(2): 296-300.
[13]Hu Y, Doeff M M, Kostecki, et al. J. Electrochem. Soc.,2004, 151(8): A1279-A1285.
[14]Sun Y H, Liu X Q. Chinese Chem. Lett., 2006, 17(8): 1093-1096.
[15]Wang G X, Bewlay S, Needham S A, et al. J. Electrochem. Soc., 2006, 153(1): A25-A31.
[16]Zhong S K, Yin Z L, Wang Z X, et al. Trans. Nonferrous Met. Soc. China,200, 16(2):s708-s710.
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