环己苯过充添加剂在锂离子电池中的应用

本文分析了环己苯作为过充保护添加剂在锂离子电池中的应用。笔者采用对所组装的锂离子电池1C倍率过充电，锂离子电池循环性能测试，交流阻抗测试，电解液电导率以及电池自放电测试研究添加环己苯的量对锂离子电池的过充保护效果以及对电池性能的影响。同时，本文分析了环己苯作为过充保护剂的可能工作原理，发现当环己苯的含量大于5％时，能对锂离子电池起到良好的过充保护作用；高于7％时会对电池循环性能产生不良影响。同时环己苯会降低电解液电导率，导致电池自放电增加。笔者认为5％－7％是环己苯作为锂离子电池添加剂的适宜比例。

Application of cyclohexyl benzene as overcharge protection additive in lithium ion batteries

The application of cyclohexyl benzene(CHB)as the overcharge protection additive in lithium ion batteries was analyzed.Through 1C overcharge testing,battery performance testing, electrochemical impedance testing,electrolyte conductivity and self-discharge testing,the use of cyclohexyl benzene as the overcharge protection additive and the effect of cyclohexyl benzene on battery performance were investigated.The possible mechanism of cyclohexyl benzene as the overcharge protection addtive was discussed.When the content of cyclohexyl benzene was more than 5%(mass),the battery could be protected from explosion.When the content of the cyclohexyl benzene exceeded 7%(mass),a detrimental effect on battery performance was found.Cyclohexyl benzene could also decrease electrolyte conductivity,leading to increased self-discharge.The proper content of cyclohexyl benzene was between 5%(mass) and 7%(mass).