高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (5): 770.

• 论文 • 上一篇    下一篇

LiNi0.3Co0.7O2的结构及其锂电池行为的研究

章福平   

  1. 复旦大学化学系, 上海, 200433
  • 收稿日期:1994-05-10 修回日期:1994-12-01 出版日期:1995-05-24 发布日期:1995-05-24
  • 通讯作者: 章福平,男,30岁,博士,现在浙江丝绸工学院纤维分院.邮编:310033
  • 作者简介:章福平,男,30岁,博士,现在浙江丝绸工学院纤维分院.邮编:310033
  • 基金资助:

    国家科委八六三高技术项目

Studies on the Structure of LiNi0.3Co0.7O2and the Behaviorof Its Lithium Battery

ZHANG Fu-Ping   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1994-05-10 Revised:1994-12-01 Online:1995-05-24 Published:1995-05-24

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摘要： 利用XRD、XPS、CV等方法研究了LiNi0.3Co0.7O2的结构及其锂电池行为。结果表明:LiNi0.3Co0.7O2具有六方晶系空间群结构,其晶胞参数a=0.2826nm,c=1.4130nm;其表面存在Li2O;Li+在其中的化学扩散系数为1～7×10-8cm2·s-1;其锂电池在4.30～3.00V间放电容量可达120～140mA·h·g-1,放电机理为Li+在其中进行两步嵌入反应。

关键词: 锂电池, 锂镍钴氧化物, 嵌入反应, 光电子能谱

Abstract: XRD, XPS and CV have been used to study the structure of LiNi0.3Co0.7O2 and the behavior of its lithium battery. It is shown that LiNi0.3Co0.7O2 has a space group R3m with hexagonal parameter a=0. 2826 nm,c=1. 4130 nm. Li2O was identified on its surface. Its lithium battery exhibited a discharge capacity of 120-140 mA. h. g-1at the rate of 0. 5-0. 1 mA. cm-2in the voltage range of 4. 30-3. 00 Vin 1mol. L-1LiClO4/PCsystem. The discharge mechanism of the battery involved a two-stage Li+intercalation in LiNi0.3Co0.7O2.Also, the chemical diffusion coefficent of Li+in LixNi0.3Co0.7O2 is about 1-7×10-8cm2· s-1in the range of x from 0. 775 to 1.

Key words: Lithium battery, Lithium nickel cobalt oxide, Intercalation reaction, XPS

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