Structure and electrochemical properties of LiFexMn2-xO4 (0 ≤ x ≤ 0.5) spinel as 5 V electrode material for lithium batteries

被引：118

作者：

Shigemura, H ^{[1
]}

Sakaebe, H

Kageyama, H

Kobayashi, H

West, AR

Kanno, R

Morimoto, S

Nasu, S

Tabuchi, M

机构：

[1] Natl Inst Adv Ind Sci & Technol, Osaka 5638577, Japan

[2] Univ Sheffield, Sheffield, S Yorkshire, England

[3] Tokyo Inst Technol, Kanagawa 2268502, Japan

[4] Osaka Univ, Osaka 5608531, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2001年 / 148卷 / 07期

关键词：

D O I：

10.1149/1.1377593

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An electroactive spinel solid solution, LiFexMn2-xO4 (0 less than or equal to x less than or equal to 0.5). was prepared and investigated. X-ray Rietveld refinements showed a small amount of transition metal ions in tetrahedral 8a sites in Fe-substituted samples. The Fe-57 Mossbauer spectrum of LiFe0.5Mn1.5O4 at 300 K is composed of two doublets and attributed to trivalent Fc. In the voltage range 3.0 and 5.3 V vs. Li/Li+. two reversible plateaus appeared at 4.9 and 3.9 V during discharge. Combined data of X-ray diffraction, Mn K-edge X-ray absorption near-edge structure (XANES), and Fe-57 Mossbauer spectroscopy obtained in situ during charge and discharge demonstrate that the plateau around 4 V on charging is associated with the oxidation of Mn3+ to Mn4+ and the plateau around 5 V with the partial oxidation of Fe3+ to Fe4+. (C) 2001 The Electrochemical Society.

引用

页码：A730 / A736

页数：7

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