期刊
CERAMICS INTERNATIONAL
卷 40, 期 8, 页码 11611-11617出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.03.144
关键词
LiNi0.5Mn1.5O4; Lithium-ion battery cathodes; Solution combustion synthesis
资金
- National Natural Science Foundation of China [51362012]
- Natural Science Foundation of Yunnan Province [2012FB173]
- Chemistry of Key Construction Disciplines for Master Degree Program in Yunnan [HXZ1309]
The LiNi0.5Mn1.5O4 (LNM) spinel lithium-ion battery cathodes were prepared by a modified low temperature solution combustion synthesis method at 600 degrees C for 3 h. Structural analyses reveal that the modified method is an effective process to eliminate an impurity phase. In comparison with the LNM prepared by a conventional method, the modified sample has higher purity, better crystallinity, smaller amount of Mn3+ ions and higher structural ordering. It exhibits remarkably superior initial discharge specific capacity of 117.0 mAh/g, and delivers a reversible capacity of similar to 116.0, 116.6, 113.8, 108.9 and 85.9 mAh/g at 0.2 C, 0.5 C, 1 C, 2 C and 5 C, respectively. While the LNM prepared by the conventional method offers a lower reversible capacity of similar to 96.3, 95.4, 89.1, 77.0 and 40.6 mAh/g at the same rate. After 50 cycles, about 95.5% of reversible capacity is retained for the LNM prepared by modified method vs. 90.7% for the LNM prepared by the conventional method. It suggests that the modified method is a simple and effective method to prepare LiNi0.5Mn1.5O4 with high performance at low temperature and in short time. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据