A study of nano-sized surface coating on LiMn2O4 materials

被引：22

作者：

Hung, Fei-Yi ^{[1
]}

Lui, Truan-Sheng ^{[1
]}

Liao, Hung-Chi ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 701, Taiwan

来源：

APPLIED SURFACE SCIENCE | 2007年 / 253卷 / 18期

关键词：

LiMn2O4; charge-discharge capacity; surface coating;

D O I：

10.1016/j.apsusc.2007.03.033

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 present study used the Pechim process with a heat treatment to synthesize LiMn2O4 powder (LMO). After surface coating, a nano-sized oxidative film of Li-Ni-Mn formed on the surface of the LMO-Ni powders. The concentration of Mn3+ for the LMO-Ni powder was lower and the average electrovalence of Mn exceeded the theoretical value, resulting in the initial capacity of the LMO-Ni powder being lower than the LMO powder. However, the LMO-Ni powder with the Li/Ni film not only restrained Mn ions from dissolving into the electrolyte, but also improved the charge-discharge cycling capacity. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：7443 / 7448

页数：6

共 15 条

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