Structural and electrochemical characterization of LiMn2-δVδOy spinels

被引：9

作者：

Hu, Y ^{[1
]}

Liu, YH ^{[1
]}

机构：

[1] Tatung Univ, Dept Mat Engn, Taipei 104, Taiwan

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2005年 / 90卷 / 2-3期

关键词：

spinel; vanadium; lithium ion rechargeable batteries; electrochemical characterization;

D O I：

10.1016/j.matchemphys.2004.01.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spinel phase compounds with the composition of LiMn2-deltaVdeltaOy were prepared by solid reaction of the mixture of LiNO3.H2O, MnCO3 and NH4VO3 powders. Evolution of the crystalline phases of the samples versus the vanadium content was analyzed using X-ray diffraction (XRD) technique, EPR and FT-IR spectroscopes. Cubic spinel is the predominant phase in the powders under heat treatment at 550 degreesC for 5 h. The valence state of manganese ion changed from +4 to +3 with vanadium substitution for charge compensation. The vanadium substitution of manganese leads the decline in capacity and cyclic behavior of the powders. The electrochemical behaviors relating to the variation of structure corresponding to the vanadium substitution were discussed. (C) 2004 Elsevier B.V. All rights reserved.

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收藏

页码：255 / 261

页数：7

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