砜类添加剂在锂离子电池电解液中的应用

Application of sulfoxide additives in electrolyte for lithium-ion battery

介绍了3种砜类物质作为锂离子电池电解液中的功能添加剂,自组装三电极测试体系和商品电池,对电极体系进行了循环伏安分析,对商品电池进行循环性能测试和高低温性能测试,结果表明,3种砜类添加剂与锂离子电池正负极都有较好的相容性,在电解液中加入这三种砜类添加剂均能明显提高电池的循环性能和高低温性能。

The application of three sulfoxide chemicals as new additives to improve the performance of electrolyte was reported in this paper. Electrochemical characterization was carried out on three-electrodes test systems and commercial lithium-ion batteries by means of CV and cycle life as well as a high and a low temperatures performance test. The experimental results showed that all of the three sulfoxide additives in electrolyte have good compatibilities with electrodes, the addition of the these three additives can improve the cycle life of batteries obviously. It was also found that these batteries with sulfoxide additives in electrolyte had a better performance at 80℃ and-20℃ than those without anyadditive.