电解质
碳酸二乙酯
碳酸乙烯酯
碳酸二甲酯
化学
溶剂
碳酸盐
丁酸乙酯
三元运算
无机化学
乙酸乙酯
有机化学
催化作用
电极
物理化学
计算机科学
程序设计语言
作者
S.V. Sazhin,Mikhail Yu. Khimchenko,Yevgeniy N. Tritenichenko,Hong S. Lim
标识
DOI:10.1016/s0378-7753(99)00434-6
摘要
In an effort to develop a useful electrolyte for a Li-ion cell applicable in a wide operation temperature, we have studied a number of ternary electrolytes containing a cyclic carbonate (ethylene carbonate (EC)), a linear carbonate (dimethyl carbonate (DMC), diethyl carbonate (DEC), or ethylmethyl carbonate (EMC)), and a low-temperature freezing solvent (methyl acetate, ethyl acetate, isopropyl acetate, isoamyl acetate, or ethyl propionate (EP)). We have studied performance including cycle life of Li-ion cells containing these electrolytes at various temperatures. The performance was various with various electrolyte compositions showing a significant effect of the low-temperature freezing solvents while the effect of the linear carbonates was relatively minor. Cells containing an electrolyte of EC–DMC–MA showed an excellent initial performance at −20°C but it did not give a good cycle life compared with others. Two electrolyte compositions containing EP, EC–DEC–EP and EC–EMC–EP, showed the most attractive overall performance including initial performance at −20°C, cycle life and rate capability at room temperature as well as 50°C.
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