Oxygen nonstoichiometry in Li2MnO3:: An alternative explanation for its anomalous electrochemical activity

被引：60

作者：

Pasero, D ^{[1
]}

McLaren, V ^{[1
]}

de Souza, S ^{[1
]}

West, AR ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 02期

关键词：

D O I：

10.1021/cm040186r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Li2MnO3 loses oxygen, reversibly, on heating above similar to600 degreesC. By 1100 degreesC, 1% of the oxygen has been lost, giving a stoichiometry of Li2MnO2.97. Depending on the synthesis conditions, materials with a range of oxygen contents may be produced. Associated with the variable oxygen content, partial reduction of Mn4+ to Mn3+ occurs, as demonstrated by a direct correlation between electrochemical capacity, when used as a cathode in a rechargeable Li test cell, and oxygen content.

引用

页码：345 / 348

页数：4

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