An attempt to formulate nonflammable lithium ion electrolytes with alkyl phosphates and phosphazenes

被引:334
作者
Xu, K [1 ]
Ding, MS
Zhang, SS
Allen, JL
Jow, TR
机构
[1] USA, Res Lab, Electrochem Branch, Adelphi, MD 20783 USA
[2] USA, Sensor & Elect Devices Directorate, Adelphi, MD 20783 USA
关键词
D O I
10.1149/1.1467946
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Using alkyl phosphates and a cyclophosphazene as cosolvents, the possibility of formulating a nonflammable electrolyte for lithium-ion batteries was explored. The emphasis was placed on determining the impact of these flame-retarding additives on the performance of the electrolyte. It was found that although the cosolvents at high contents (>10%) effectively suppress the flammability of the electrolyte, their flame-retarding effectiveness is still insufficient to render the electrolytes completely nonflammable. Furthermore, such reduction in electrolyte flammability is always realized at the expense of performance; electrochemical instability of phosphates results in severe capacity fading, while high viscosity of these cosolvents reduces both capacity utilization and power. (C) 2002 The Electrochemical Society.
引用
收藏
页码:A622 / A626
页数:5
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