Electrochemical conversion of LiMn2O4 to MgMn2O4 in aqueous electrolytes

被引：44

作者：

Sinha, Nupur Nikkan ^{[1
]}

Munichandraiah, N. ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2008年 / 11卷 / 11期

关键词：

D O I：

10.1149/1.2972990

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

It is shown that the Li+ ion in LiMn2O4 can be replaced by the Mg2+ ion, resulting in the formation of MgMn2O4 in aqueous Mg(NO3)(2) electrolytes by subjecting LiMn2O4 electrodes to cyclic voltammetry. The additional electronic charge due to the Mg2+ ion is compensated by a decrease in the average oxidation state of Mn from 3.5 in LiMn2O4 to 3.0 in MgMn2O4. Chemical analysis, powder X-ray diffraction, energy dispersive X-ray analysis and X-ray photoelectron spectroscopy studies confirm the presence of Mg in the compound. Cyclic voltammetry and chronopotentiometry studies suggest that MgMn2O4 can undergo reversible redox reaction by intercalation/deintercalation of Mg2+ ions in aqueous Mg(NO3)(2) electrolytes. (C) 2008 The Electrochemical Society.

引用

页码：F23 / F26

页数：4

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