Synthesis of LixMnO2 by chemical lithiation in an aqueous media

被引：10

作者：

Jung, Won Il ^{[1
]}

Nagao, Miki ^{[1
]}

Pitteloud, Cedric ^{[1
]}

Yamada, Atsuo ^{[1
]}

Kanno, Ryoji ^{[1
]}

机构：

[1] Tokyo Inst Technol, Interdisciplinary Grad Sch Sci & Engn, Dept Elect Chem, Midori Ku, Yokohama, Kanagawa 2268502, Japan

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 10期

关键词：

Chemical lithiation; gamma-MnO2; Formaldehyde; Aqueous media; Lithium battery; SECONDARY LI CELLS; MANGANESE-DIOXIDE; RAMSDELLITE; CHEMISTRY; BATTERIES; CATHODES;

D O I：

10.1016/j.jpowsour.2009.11.132

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：

LixMnO2 (x=0.302) was synthesized by chemical lithiation, using a formaldehyde reducing agent and a LiOH lithium source in an aqueous media. The electrochemical properties and structural stability of the product were characterized by X-ray diffraction and charge-discharge measurements. The chemically lithiated LixMnO2 had a first charge and discharge capacity of 86.2 and 265 mAh/g, respectively, with good cycling behavior. Based on the electrochemical results of the first charge, a two-step mechanism of LixMnO2 lithiation is proposed. gamma-MnO2 is first oxidized by formaldehyde, and then Li diffuses into the gamma-MnO2 lattice. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3328 / 3332

页数：5

共 18 条

[1] Lithiation of ramsdellite-pyrolusite MnO2;: NMR, XRD, TEM and electrochemical investigation of the discharge mechanism [J].