Using a boron-based anion receptor additive to improve the thermal stability of LiPF6-based electrolyte for lithium batteries

被引：87

作者：

Sun, X ^{[1
]}

Lee, HS ^{[1
]}

Yang, XQ ^{[1
]}

McBreen, J ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2002年 / 5卷 / 11期

关键词：

D O I：

10.1149/1.1510321

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The possibility of using a strong anion coordinate agent, tris(pentafluorophenyl) borane (TPFPB), to suppress the thermal decomposition of LiPF6-based electrolyte was studied. Cyclic voltammogram measurements showed that addition of 0.1 M TPFPB maintained electrochemical stability of a LiPF6-based electrolyte at 55degreesC for a week, while under the same conditions severe degradation in electrochemical stability was observed in the same LiPF6-based electrolyte without the TPFPB additive. A Li/LiMn2O4 cell with a composite LiPF6-based electrolyte containing 0.1 M TPFPB additive also exhibited superior capacity retention and cycling efficiency at 55degreesC than a cell with an electrolyte without additive. These data demonstrate the excellent effect of TPFPB additive in improving the thermal stability of LiPF6-based electrolyte. (C) 2002 The Electrochemical Society.

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页码：A248 / A251

页数：4

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