无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2013, Vol. 45 ›› Issue (12): 60-.

• 论文 • 上一篇    

正极材料钴酸锂表面固体电解质相界面膜的研究

王 坤,张 玥,任春燕,刘大凡,赵 洪,安 峰,张晓行   

  1. 中海油天津化工研究设计院,天津  300131
  • 出版日期:2013-12-10 发布日期:2013-12-09

Study on SEI film of cathode material LiCoO2

WANG   Kun, ZHANG   Yue, REN  Chun-Yan, LIU  Da-Fan, ZHAO   Hong, AN   Feng, ZHANG  Xiao-Xing   

  1. CNOOC Tianjin Chemical Research & Design Institute,Tianjin 300131,China
  • Published:2013-12-10 Online:2013-12-09

摘要: 通过循环伏安和交流阻抗(EIS)分析,对锂离子电池正极材料钴酸锂(LiCoO2)表面的固体电解质相界面膜(SEI膜)的形成进行了研究。循环伏安测试结果表明,钴酸锂表面的SEI膜主要是在第1次循环过程中形成。EIS测试结果表明,在低倍率条件下和常温条件下充放电循环形成的SEI膜更加致密,阻抗值更小;储存时间的长短对电池的阻抗也有影响,储存7 d的阻抗值要小于储存1 d的阻抗值。

关键词: 固体电解质相界面膜, 钴酸锂, 循环伏安, 交流阻抗

Abstract: The formation of solid electrolyte interface(SEI) film on the surface of LiCoO2,the cathode material of lithium ion battery was investigated by cyclic voltammetry curves and electrochemical impedance spectroscopy(EIS).Cycle voltammetry curves showed the SEI film of LiCoO2 formed in the first cycle.EIS results showed the SEI film formed at low rate and  normal temperature were denser and had lower resistance value.The storage time also had influence on the resistance of lithium ion battery,and the resistance value with 7 storage days was lower than that of 1 day.

Key words: solid electrolyte interface film, LiCoO2, cyclic voltammetry curves, electrochemical impedance spectroscopy(EIS)

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