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电化学(中英文) ›› 1995, Vol. 1 ›› Issue (3): 342-347. 

• 研究论文 • 上一篇    下一篇

酒石酸法合成的LiCoO_2的结构及其二次锂电池行为研究

章福平   

  1. 浙江丝绸工学院纤维分院
  • 收稿日期:1995-08-28 修回日期:1995-08-28 出版日期:1995-08-28 发布日期:1995-08-28

Studies on the Structure of LiCoO_2 Synthesized with Tartaric Acid and the Behaviorof its Rechargeable Lithium Battery

Zhang Fuping   

  1. (College of Fiber Engineering, Zhejiang Institute of Silk Textites, Hang Zhou 310033
  • Received:1995-08-28 Revised:1995-08-28 Published:1995-08-28 Online:1995-08-28

摘要: 采用X射线衍射,光电子能谱,库仑滴定,循环伏安等方法研究酒石酸法合成的LiCoO_2的结构及其二次锂电池行为。结果表明LiCoO_2具有六方晶系空间群结构,相应晶胞参数a=0.2810nm,c=1.4088nm;其中Co ̄(3+)为低自旋;且其表面存在Li_2O。同时,其二次锂电池电容量可达120mA·h·g ̄(-1),半容量工作电压达3.8v,当正极中Li ̄+含量(X)为0.451≤x≤0.934时,该电池开路电压(E)符合:E=4.318-0.450X ̄(2/3)。

关键词: 锂钴氧化合物, 锂电池, 酒石酸, 嵌入反应

Abstract: The structure of LiCoO_2 synthesized with tartaric acid and the behavior of itsrechargeable Lithium battery have been studied by XRD, XPS, CV. CT. It has been shown thatLiCoO_2 has a space group R3m with hexagonal parameters a=0.281 0 nm,c=1.408 8 nm. Low-spin state Co ̄(3+) configuration in LiCoO_2 has been suggested. Also,Li_2O, was identified onits surface.Furthermore, the capacity and the middle working voltage of its Lithium battery are about 120 mA·h·g ̄(-1) and 3.8 V,respectively.The EMF of the cell changes with the Lithium composition of itscathode following E=4.318-0.450 X ̄(2/3) in 0.451≤X≤0.934.

Key words: Lithium cobalt oxide, Lithium battery, Tartaric acid, Intercalation reaction

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