2-氯苯甲醚对锂离子电池防过充性能的影响  

Electrochemical behavior of electrolyte additive for overcharge protection of Li-ion batteries

作　　者：曾彪[1] 黄可龙[1] 刘素琴[1] 刘建生 李永坤 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]广州天赐高新材料股份有限公司,广东广州510760

出　　处：《电源技术》2009年第12期1054-1056,共3页Chinese Journal of Power Sources

基　　金：广东省教育部产学研结合项目(2007A090302034)

摘　　要：采用循环伏安扫描、充放电循环、过充测试等手段,研究了2-氯苯甲醚作为锂离子电池电解液添加剂,对电池的防过充性能及常温循环寿命、高温循环性能的影响。研究发现,2-氯苯甲醚的氧化峰电位为4.67V(vs.Li/Li+),在磷酸铁锂电池中与石墨负极具有较好的相容性。0.5C/5h、1C/3h过充时不漏液、不起火、不爆炸;作为添加剂使用时电池1C倍率常温循环338次容量保持率为81.4%;60℃高温1C倍率循环200次容量保持率为79.9%。The effects of 2-chloroanisole as electrolyte additive of Li-ion battery on overcharge protection, and normal and high temperature cycle performance were investigated by the oxide peak potential of 2-chloroanisole. The results show that the polymerize potential of electrolyte is 4.67 V, which has good compatibility with graphite cathode in LiFePO4battries . The overcharging tolerance of the batteries with 2-chloroanisole electrolyte is improved, and can endure overcharge of 0.5 C/5 h, 1 C/3 h.The capacity retention rate of prismatic lithum-ion batteries is 81.4% after 338 cycles at 1 C under normal temperature and 79.9% after 200 cycles under 60 ℃ at 1 C.

关 键 词：锂离子电池 电解液添加剂 过充保护 2-氯苯甲醚 

分 类 号：TM912[电气工程—电力电子与电力传动]