电解液添加剂对金属锂电极的表面改性  

Surface modification of electrolyte additives on lithium metal electrode

作　　者：高鹏[1] 朱永明[1] 张翠芬[2] 李宁[1,2] 

机构地区：[1]哈尔滨工业大学海洋学院应用化学系,山东威海264209 [2]哈尔滨工业大学化工学院应用化学系,黑龙江哈尔滨150001

出　　处：《电源技术》2010年第3期230-232,共3页Chinese Journal of Power Sources

基　　金：威海市科技攻关资助项目(2008GGA00200809-05104143);哈尔滨工业大学(威海)研究基金资助项目(HITWH2008IMJQ10080001)

摘　　要：为了提高金属锂二次电池中锂电极的性能,在电解液中添加了不同比例的1,4-二氧六环,测试了Li-LiCoO2扣式电池的性能。结果表明,在电解液中添加质量分数2%的1,4-二氧六环可使锂电极循环寿命大大增加,利用率增加10%,放电平台提高约100mV。与用1,4-二氧六环进行表面预处理电池相比,利用率和循环寿命差不多,但高次循环的放电平台可增加约80mV。而且,添加质量分数2%的1,4-二氧六环后电池的大电流放电性能也较好。The influence of electrolyte additives on lithium metal electrode was investigated.1,4-dioxane was employed as the electrolyte additives,and Li-LiCoO2 coin cell was tested.It is found that the cycling life of lithium electrode is improved greatly by utilizing 2% 1,4-dioxane as electrolyte additives.The cycling efficiency increases 10% and discharge plateau increases around 100 mV.The large current discharge performance is also improved.In contrast,the cycling life and efficiency of the cell pretreated with 1,4-dioxane are nearly the same with that by using 2 % 1,4-dioxane as electrolyte additives,but the discharge plateau at high cycle number increases about 80 mV.

关 键 词：金属锂二次电池 锂电极 电解液添加剂 1 4-二氧六环 

分 类 号：TM912.9[电气工程—电力电子与电力传动]