Lithium Storage Using Conversion Reaction in Maghemite and Hematite

被引：29

作者：

Hariharan, Srirama ^{[1
]}

Saravanan, Kuppan ^{[2
]}

Balaya, Palani ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2010年 / 13卷 / 09期

关键词：

ION BATTERIES; LI-STORAGE; NANOCOMPOSITES; CAPACITY;

D O I：

10.1149/1.3458648

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report here on the lithium storage performance of alpha- and gamma-Fe(2)O(3), undergoing conversion reaction at C/10 and 2C. Both alpha- and gamma-Fe(2)O(3) transform to nanostructured Fe/Li(2)O composite during the first discharge, while the first charge results in the formation of nanosized gamma-Fe(2)O(3). Such a transition from alpha-Fe(2)O(3) to gamma-Fe(2)O(3) is attributed to its thermodynamics at the nanosize. Better storage performance of gamma-Fe(2)O(3) at 2C compared with alpha-Fe(2)O(3) is attributed to the formation of highly crystalline, nanosized gamma-Fe(2)O(3). Apart from the reported inherent electronic conductivity of alpha-Fe(2)O(3), the thermodynamics at the nanosize is also found to be one of the rate-limiting factors. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3458648] All rights reserved.

引用

页码：A132 / A134

页数：3

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