A thermal stabilizer for LiPF6-based electrolytes of Li-ion cells

被引：73

作者：

Zhang, SS ^{[1
]}

Xu, K ^{[1
]}

Jow, TR ^{[1
]}

机构：

[1] USA, Res Lab, Adelphi, MD 20783 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2002年 / 5卷 / 09期

关键词：

D O I：

10.1149/1.1499669

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report that tris(2,2,2- trifluoroethyl) phosphite (TTFP), in which the oxidization number of phosphor is three (III), can effectively improve thermal stability of LiPF6-based electrolytes of Li-ion cells. Effect of TTFP on the performance of Li/graphite, Li/cathode, and Li-ion cells is estimated using cyclic voltammetry and galvanostatic cycling. Results show that TTFP is electrochemically stable in Li-ion chemistry. We also found that TTFP can prevent propylene carbonate (PC) decomposition and graphite exfoliation in Li/graphite half-cell. We propose a mechanism of TTFP protecting LiPF6 and discuss the effect of TTFP on cell performance. (C) 2002 The Electrochemical Society.

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页码：A206 / A208

页数：3

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