LiPF_6电解液对水的稳定性研究  

Study on the stability of LiPF_6-based electrolyte

作　　者：郭亚菊[1] 杨立[1] 王保峰[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《电源技术》2007年第2期136-139,共4页Chinese Journal of Power Sources

摘　　要：锂离子蓄电池中LiPF6电解液的稳定性一直受到人们的关注。使用卡尔费休水分测量仪测量LiPF6电解液中水的浓度,研究了LiPF6与水反应的动力学特性。结果表明,在LiPF6电解液中,1个LiPF6分子能与2个H2O分子发生反应;LiPF6与水反应的速率常数随着温度的升高而迅速增大;在电解液体系中,LiBF4和LiTFSI的水解稳定性高于LiPF6。The stability of LiPF6-based electrolytes for lithium-ion battery has been attracted much attention. The kinetics of the reaction between LiPF6 and H2O were studied by Karl-Fischer titration. The results show that one LiPF6 molecule can react with two water molecules in the LiPF6-based electrolytes; rate constant （k） rises rapidly with the increasing of temperature; the stabilities of LiBF4-based and LiTFSI-based electrolytes are better than LiPF6-based electrolyte.

关 键 词：稳定性 锂盐 动力学 

分 类 号：TM912.9[电气工程—电力电子与电力传动]