锂离子电池电解液过充添加剂的行为

被引：19

作者：

胡传跃

李新海

王志兴

郭华军

机构：

[1] 中南大学冶金科学与工程学院

[2] 中南大学冶金科学与工程学院长沙

[3] 长沙

来源：

中国有色金属学报 | 2004年 / 12期

关键词：

联苯; 环己基苯; 电解液; 锂离子电池; 过充;

D O I：

10.19476/j.ysxb.1004.0609.2004.12.026

中图分类号：

TM911 [化学电源、电池、燃料电池];

学科分类号：

0808 ;

摘要：

制备了 3种 1mol/LLiPF6电解液 ,溶剂组成分别为 :1)碳酸乙烯酯 ,碳酸二甲酯和碳酸甲乙酯 ;2 )碳酸乙烯酯 ,碳酸二甲酯 ,碳酸甲乙酯和 4 %联苯 ;3)碳酸乙烯酯 ,碳酸二甲酯 ,碳酸甲乙酯和 4 %环己基苯。采用线性电压扫描法、锂循环效率法、锂离子电池的循环性能法和 3C倍率过充的方法测试了联苯与环己基苯电解液过充添加剂的行为。结果表明 :环己基苯是一种较实用的锂离子电池电解液过充添加剂 ,环己基苯的电化学稳定性比联苯的高 ,环已基苯的氧化电势为 4 .72V(vsLi/Li+ ) ,联苯的为 4 .5 4V(vsLi/Li+ ) ;以 1mA电流循环 2 0次后 ,联苯的铂电极锂循环效率为 15 .7% ,环己基苯的为 5 9.3% ;锂离子电池以 1C循环 15 0次后 ,环己基苯的容量保持率为 88% ,联苯的为 76 .3%。环己基苯与联苯添加剂都改善了锂离子电池的耐过充性能 ,且两者的效果十分接近

引用

页码：2125 / 2130

页数：6

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