Electrochemical and structural characteristics of metal oxide-coated lithium manganese oxide (spinel type) Part I. In the range of 2.5-4.2 V

被引：32

作者：

Lee, SW

Kim, KS

Moon, HS

Lee, JP

Kim, HJ

Cho, BW

Cho, W

Park, JW

机构：

[1] Hanyang Univ, Div Engn & Mat Sci, Seoul 133791, South Korea

[2] Korea Inst Sci & Technol, Nanoeco Res Ctr, Seoul 136791, South Korea

[3] Res Ctr Energy Convers & Storage, Seoul 151742, South Korea

来源：

JOURNAL OF POWER SOURCES | 2004年 / 130卷 / 1-2期

关键词：

li-ion battery; lithium manganese oxide; spinel; aluminum oxide; metal oxide coating; surface treatment;

D O I：

10.1016/j.jpowsour.2003.11.061

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 electrochemical and structural characteristics of the metal oxide-coated spinet were investigated in the range of 2.5-4.2 V. Metal oxide coating, on commercial spinet powder (LiMn2-xMxO4, M = Zr, Nikki, Japan) was carried out using the sol-gel method. Al2O3/(PtOx or CuOx)-coated spinet exhibited improved cyclability compared to bare spinet. Impedance analysis results indicated that electrochemical resistance value was not consistent with cycle performance. The improved cycle performance of metal oxide-coated spinet may be due to formation of a new Li2Mn4O9, Li2MnO3 phase, which is expected to have stability to phase transition (Jahn-Teller distortion). (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：227 / 232

页数：6

共 19 条

[1] Surface treatments of Li1+xMn2-xO4 spinels for improved elevated temperature performance [J].