Electrochemistry beyond Mn4+ in LixMn1-yLiyO2

被引：42

作者：

Armstrong, AR ^{[1
]}

Bruce, PG ^{[1
]}

机构：

[1] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2004年 / 7卷 / 01期

关键词：

D O I：

10.1149/1.1625591

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrodes based on the layered compounds Li-x[Mn1-yLiy]O-2, y less than or equal to 0.2, have been charged in the electrolyte, 1 m LiPF6 in ethylene carbonate/diethyl carbonate (1:2 v/v). Initially Li+ removal is accompanied by oxidation of Mn3+ to Mn4+. Once all Mn is in the 4+ oxidation state further Li+ removal occurs by two unconventional mechanisms, one involving oxidation of O2- with subsequent O loss (effective removal of Li2O) and the other electrolyte oxidation generating H+ which exchanges for Li+ in the electrode. Although both mechanisms appear to occur at 30 and 55degreesC, the former dominates at both temperatures in contrast to Li2MnO3. (C) 2003 The Electrochemical Society.

引用

页码：A1 / A4

页数：4

共 22 条

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