有机溶剂对锂离子电池性能的影响

Effects of organic solvents on performance of Li-ion battery

选用恒流充放电法测试了EC、DEC、DMC和EMC等有机溶剂体系对锂离子电池的容量保持率、平台保持率、充放电循环性能和温度特性的影响。实验结果表明 :二乙基碳酸酯 (DMC)不但具有较高的平台保持率 ,而且有利于电池的大电流充放电 ;二甲基碳酸酯 (DEC)对电池的循环寿命有较大的改善作用 ;乙基甲基碳酸酯 (EMC)具有较好的温度特性。

The influences of organic solvents ethylene carbonate (EC),diethyl carbonate(DEC),dimethyl carbonate(DMC) and ethyl methyl carbonate(EMC) in various combination on the capacity holding rate,plateau holding rate,charge-discharge perfor-mance and temperature properties of Li-ion batteries were investigated by galvanostatic charge-discharge. The experimental results indicated that DMC had higher plateau holding rate,in favor of charging-discharging properties at higher current density.DEC could improve cycle life of Li-ion battery and EMC had better temperature properties.