东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (4): 271-274.DOI: -

• 论著 • 上一篇    下一篇

锂离子电池正极材料LiFePO_4的合成及电化学性能

曲涛;田彦文;钟参云;翟玉春   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-04-15 发布日期:2013-06-24
  • 通讯作者: Qu, T.
  • 作者简介:-
  • 基金资助:
    辽宁省科技攻关项目(2003224005)·

Synthesis and electrochemical performance of cathode material LiFePO4 for lithium-ion battery

Qu, Tao (1); Tian, Yan-Wen (1); Zhong, Can-Yun (1); Zhai, Yu-Chun (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-04-15 Published:2013-06-24
  • Contact: Qu, T.
  • About author:-
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摘要： 采用固相合成法在不同温度制度下合成掺杂碳的LiFePO4正极材料,计算出各样品的结构参数并对各样品进行电化学测试·结构参数的计算结果表明:合成温度升高,样品的结晶程度更好,结构更紧凑,更趋稳定·电化学测试结果说明:700℃合成的产物具有良好的电化学性能,在0 1C倍率下放电,其室温初始放电容量为140 4mAh/g,循环10次后容量衰减较小·此条件合成的LiFePO4放电容量与目前工业化生产的LiCoO2相当,具有良好的应用前景·

关键词: 锂离子电池, 正极材料, LiFePO4, 固相法, 合成温度

Abstract: The olivine LiFePO4 was studied as cathode material for lithium-ion battery. Carbon-doped LiFePO4 was synthesized through solid-state reaction at different temperatures, of which the structural parameters of samples were calculated and electrochemical tests were performed for samples. The calculated results showed that with the elevated synthesizing temperature, the samples show higher crystallinity and more compact and stable structure. The testing results showed that the samples synthesized at 700°C have good electrochemical performance. The initial specific capacity discharged at 0.1 C rate and room temperature is 140.4 mAh/g, with very little capacity fading after 10 cycles. The discharge capacity of LiFePO4 synthesized in such a way is equivalent to that of the present commercial LiCoO2 as cathode material. It has a promising future in application.

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