本文研究了用于锂电池的LiPF6＿乙烯碳酸酯(EC)＿甲基乙酸酯(MA)电解液体系,测定了该体系在不同的溶剂配比和盐浓度下于20℃～-50℃时的电导率,给出该体系性能最佳的溶剂配比和盐浓度,以此进行循环伏安和充放电测试,并与商用电解液(LiPF6 EC 二乙基碳酸酯(DEC)进行了比较.
The system of LiPF6_ethylene carbonate (EC) _methy1 acetate (MA) was studied. The conductivities of this system were measured under various composition and various salt concentrations at temperature range of 20～-50 ℃. The optimum composition of this system was selected. The tests of cyclic voltammography and charge_discharge were carried out. This system was compared with commercial electrolyte solution.
[1] Ein＿EliY,McdevittS.Methy1propy1carbonate:apromisingsinglesolventforLi＿ionbatteryelectrolytes[J].J.Electrochem.Soc.,1997,7(144):L180.
[2] Ein＿EliY,ThomasRS,ChadhaR,etal.Li＿ionbatteryelectrolyteformulatedforlow＿temperatureapplications[J].J.Electrochem.Soc.,1997,3(144):823.
[3] SmartMC,RatnakumarBV,SurampudiS.Useoforganicestersascosolventsinelectrolytesforlithium＿ionbatterieswithimprovedlowtemperatureperformance[J].J.Electrochem.Soc,2002,4(149):A361.
[4] JinWei＿hua,WuGuo＿liang,LiuRen＿min,etal.第23届全国化学与物理学术会议论文集[C].Hangzhou:1988,340～341.
