Chemically oxidized manganese dioxides for lithium secondary batteries

被引：7

作者：

Jung, Won Il ^{[1
]}

Sakamoto, Kazuyuki ^{[1
]}

Pitteloud, Cedric ^{[1
]}

Sonoyama, Noriyuki ^{[1
]}

Yamada, Atsuo ^{[1
]}

Kanno, Ryoji ^{[1
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Midori Ku, 4259 Nagatsuta, Yokohama, Kanagawa 2268507, Japan

来源：

JOURNAL OF POWER SOURCES | 2007年 / 174卷 / 02期

关键词：

manganese dioxide; chemical oxidation; lithium secondary battery;

D O I：

10.1016/j.jpowsour.2007.06.098

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：

The specific discharge capacity of gamma-MnO2 was improved with chemical oxidation and vacuum-drying processes. The intergrowth structure and electrochemical performance were studied by X-ray diffraction and electrochemical measurements; the structure-electrochemical property relationships were clarified. Vacuum-dried gamma-MnO2 showed structural changes with capacity fade as the temperature increased, while the chemically oxidized gamma-MnO2 showed no structural change without any capacity fading. The latter material showed a first discharge capacity of 275 mAh g(-1), and a reversible capacity of 250 mAh g(-1) with two discharge plateaux after second cycle, which is the highest capacity among the gamma-MnO2 prepared previously. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1137 / 1141

页数：5