Structural change of LiNi1/2Mn1/2O2 during charge and discharge in nonaqueous lithium cells

被引：9

作者：

Ariyoshi, Kingo ^{[1
]}

Ichikawa, Tomohiro ^{[1
]}

Ohzuku, Tsutomu ^{[1
]}

机构：

[1] Osaka City Univ, Dept Appl Chem, Grad Sch Engn, Osaka 558585, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 5-6期

关键词：

oxides; chemical synthesis; X-ray diffraction; crystal structure;

D O I：

10.1016/j.jpcs.2007.10.087

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The structural change of LiNi1/2Mn1/2O2 (a = 2.89 angstrom, c = 14.31 angstrom in hexagonal setting) during charge and discharge was examined by means of ex-situ X-ray diffraction (XRD) measurements. The integrated intensity ratio of the (003) to (104) diffraction lines increased from ca. 0.9 at an initial state to ca. 1.5 when LiNi1/2Mn1/2O2 was oxidized up to x = 0.7 in Li1-xNi1/2Mn1/2O2 corresponding to the charge capacity of 200 mA h g(-1) based on the sample weight, while the change in lattice dimensions of a- and c- axis was similar to those of LiCoxNi1-xO2. The change in the intensity ratio of I-(003)/I-(104) was reversible between ca. 0.9 and 1.5 during charge and discharge. From these results, structural changes of layered lithium insertion material of LiNi1/2Mn1/2O2 during charge and discharge were discussed. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1238 / 1241

页数：4

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