Effect of structure on the storage characteristics of manganese oxide electrode materials

被引：16
作者：
Park, Yong Joon
Doeff, Marca M. [1 ]
机构：
[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA
[2] Kyonggi Univ, Div Adv Ind Engn, Suwon 443760, Gyeonggi, South Korea
来源：
JOURNAL OF POWER SOURCES | 2007年 / 165卷 / 02期
关键词：
manganese oxides; cathode materials; storage at 55 degrees C; manganese dissolution;
D O I：
10.1016/j.jpowsour.2006.10.029
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Eleven types of manganese-containing electrode materials were subjected to long-term storage at 55 degrees C in 1 M LiPF6 ethylene carbonate/dimethyl carbonate (EC/DMC) solutions. The amount of manganese dissolution observed depended upon the sample surface area, the average Mn oxidation state, the structure, and substitution levels of the manganese oxide. In some cases, structural changes such as solvate formation were exacerbated by the high temperature storage, and contributed to capacity fading upon cycling even in the absence of significant Mn dissolution. The most stable materials appear to be Ti-substituted tunnel structures and mixed metal layered oxides with Mn in the +4 oxidation state. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：573 / 580
页数：8
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