研究了不同碳酸亚乙烯酯（VC）含量对锰酸锂体系动力电池的高温寿命的影响以及VC在电池循环中的消耗行为,结果表明,VC含量为3%（质量分数）时电池60℃的高温循环性能最佳,电化学交流阻抗（EIS）分析结果表明,随着VC含量的增大,负极SEI阻抗增大,直至含量为3%时达到最大值;还发现5Ah动力电池在60℃循环过程中,随着VC含量的不同,电池在循环一定次数之后,电解液中的VC都会消耗完,说明VC主要参与首次充放电过程中的固体电解质膜（SEI）形成,并在循环的前期参与部分SEI膜的修复,由于VC完全消耗之后电池的寿命曲线并未出现突降,说明VC是否存在对电池后期寿命影响较小。
This paper studyed of the VC content effects on battery＇s cycling performance under high temperature and its consumption procedure, result is that batteries perform the best 60℃ cycling performance when VC con- tents is 3wt%. EIS shows that the resistance of the anode＇s solid electrolyte interface（SEI）accrescents as the VC content increases and rises to the top when it reaches 3 %. It also discoveries that VC will always be used up after certain cycle number no matter how much VC electrolyte contents. This indicates that VC has effect on the repair of SEI in former time not latter one. But the life cycle curve does not appear sudden drop, it indicates that the effects VC made on battery mainly forms before the forming process, once the SEI has formed, VC will do little benefit.
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