正极材料钴酸锂表面固体电解质相界面膜的研究  

Study on SEI film of cathode material LiCoO2

作　　者：王坤[1] 张玥[1] 任春燕[1] 刘大凡[1] 赵洪[1] 安峰[1] 张晓行[1] 

机构地区：[1]中海油天津化工研究设计院,天津300131

出　　处：《无机盐工业》2013年第12期60-62,共3页Inorganic Chemicals Industry

基　　金：天津市自然科学基金资助项目(11JCYBJC08000)

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。The formation of solid electrolyte interface （SEI） film on the surface of LiCoO2, the cathode material of lithium ion battery was investigated by cyclic vohammetry curves and electrochemical impedance spectroscopy （EIS）.Cycle vohammetry 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.

关 键 词：固体电解质相界面膜 钴酸锂 循环伏安 交流阻抗 

分 类 号：TQ131.11[化学工程—无机化工]