Improved elevated temperature cycling of LiMn2O4 spinel through the use of a composite LiF-based electrolyte

被引：59

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 | 2001年 / 4卷 / 11期

关键词：

D O I：

10.1149/1.1405036

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A composite electrolyte containing LiF and a tris(pentafluorophenyl)borane (TPFPB) anion complexing agent displays superior thermal and electrochemical stability compared to commercial LiPF6-based electrolytes. Severe capacity fading of a Li/LiMn2O4 cell. with a commercial LiPF6 electrolyte, was observed when cycled at 55 degreesC. The capacity fading was attributed to acidic products, from salt hydrolysis and decomposition of the solvent, which degraded LiMn2O4 electrode. The composite electrolyte containing LiF and TPFPB is not moisture sensitive and does not produce acidic species. At room temperature, the composite electrolyte shows an improvement in capacity maintenance with cycling. However, at 55 degreesC the improvement is much greater. (C) 2001 The Electrochemical Society.

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页码：A184 / A186

页数：3

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