Powder property and electrochemical characterization of Li2MnO3 material

被引：104

作者：

Park, Sang-Ho

Sato, Yuichi

Kim, Jae-Kook

Lee, Yun-Sung

机构：

[1] Chonnam Natl Univ, Fac Appl Chem Engn, Kwangju 500757, South Korea

[2] Chonnam Natl Univ, Dept Mat Sci & Engn, Kwangju 500757, South Korea

[3] Kanagawa Univ, Dept Appl Chem, Yokohama, Kanagawa 2218686, Japan

[4] Argonne Natl Lab, Argonne, IL 60439 USA

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 102卷 / 2-3期

关键词：

Li2MnO3; phase transformation; electrochemical properties; cathode materials;

D O I：

10.1016/j.matchemphys.2006.12.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Li2MnO3 materials were synthesized at various calcination temperatures by the conventional solid state reaction. The Li2MnO3 powders were characterized by means of XRD, SEM, and TEM analyses. The particle properties of the Li2MnO3 powders, such as their surface morphology and oxygen content, as well as their electrochemical behaviors varied according to the calcinations temperatures. The discharge capacities of the Li/Li2MnO3 cells decreased with increasing calcination temperatures. The resulting Li2MnO3 material was mainly composed of Li2MnO3, sub-LiMnO2, and sub-LiMn2O4 phases. The unexpected reversible discharge capacity of Li/LiNnO(3) cell fabricated in this study originated from the phase transformation between layered LiMnO2 and cubic LiMn2O4 phases in this material. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：225 / 230

页数：6

共 14 条

[1] Synthesis of layered LiMnO2 as an electrode for rechargeable lithium batteries [J].