(1. 中南大学 冶金科学与工程学院，长沙 410083；
2. 深圳市海盈科技有限公司，深圳 518104)
摘 要: 研究在电解液中添加环己基苯(CHB)对锰酸锂锂离子电池的防过充性能的影响，考察CHB的加入对电池循环性能及容量等的影响。并采用红外光谱和扫描电镜等方法分析正极产物及正极表面形貌，以确定添加剂的防过充机理。结果表明：在电解液中添加2%的CHB可明显提高锰酸锂电池的耐过充性能，在3C/10 V极端条件下，电池不起火不爆炸，循环100周后，容量保持率为93.22%，CHB的防过充机理为阻断机理。
关键字: 环己苯；锰酸锂；锂离子电池；过充安全性
（1. School of Metallurgy Science and Engineering, Central South University, Changsha 410083, China;
2. Shenzhen Herewin Technology Co. Ltd., Shenzhen 518104, China）
Abstract:Cyclohexyl benzene(CHB) was studied as an overcharge protection additive in the spinel LiMn2O4 lithium-ion cell. The effect of CHB on cycle ability and capacity of cell was also investigated. And the mechanism of overcharge protection of cathode was analysed by infrared spectra and SEM. The results show that doping 2% of CHB can improve the 3C/10V overcharge safety of LiMn2O4 lithium-ion cell, which don’t fire and explode. And it is no harmful to the cycle ability and capacity of cells. Also the mechanism of overcharge protection is interdiction mechanism.
Key words: cyclohexyl benzene; lithium manganese oxide; lithium-ion battery; overcharge safety performance
ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK
ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW