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电化学(中英文) ›› 1996, Vol. 2 ›› Issue (3): 305-309. 

• 研究论文 • 上一篇    下一篇

二次Li/LiNi_(0.3)Co_(0.7)O_2电池反应研究

章福平   

  1. 浙江丝绸工学院纤维分院
  • 收稿日期:1996-08-28 修回日期:1996-08-28 出版日期:1996-08-28 发布日期:1996-08-28

Studies on the Charge and Discharge Reaction of Li/LiNi_(0.3)Co_(0.7)O_2 Battery

Zhang Fupjng   

  1. (College of Fiber Engineering,Zhejiang Institute of Silk Textiles,Hongzhou 310033
  • Received:1996-08-28 Revised:1996-08-28 Published:1996-08-28 Online:1996-08-28

摘要: 利用循环伏安,库仑滴定,X射线衍射,恒电流阶跃等方法研究了Li/LiNi_(0.3)Co_(0.7)O_2电池反应.结果表明该电池在4.30~3.00V间放电容量可达120~140mA·h·g ̄(-1),充、放电机理为Li+在LiNi_(0.3)Co_(0.7)O_2中进行两步脱嵌与嵌入反应.并计算了8℃和40℃时两步脱嵌反应的焓和熵及自由能变化.同时,讨论了Li+在LiNi_(0.3)Co_(0.7)O_2中的化学扩散系数和电导随其含量变化的规律。

关键词: 锂电池, 锂镍钴氧化物, 嵌入反应

Abstract: The charge and discharge reaction of Li/LiNi0.3Co0.7O2 battery have been studied by using CV,CT,XRD and GCP.It is shown that the discharge capacity of the cell reaches 120-140 mA·h·g(-1) in the 4.30-3.00 V in 1 mol/L LiClO4/PC electrolyte system. The discharge mechanism involve a two-step Li+ intercalation reaction. The thermodynamic data such as △G,△S,△H,of the reaction are given. Furthermore,the changes of the Dor σi of Li+ with its composition have been discussed.

Key words: Lithium Battery, Lithium Nickel Cobalt Oxide, Intercalation Reaction

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