Improved Co-substituted, LiNi0.5-xCo2xMn1.5-xO4 lithium ion battery cathode materials

被引：56

作者：

Jang, Min-Woo ^{[2
]}

Jung, Hun-Gi ^{[2
]}

Scrosati, Bruno ^{[1
,2
]}

Sun, Yang-Kook ^{[2
,3
]}

机构：

[1] Univ Roma La Sapienza, Dept Chem, I-00185 Rome, Italy

[2] Hanyang Univ, Dept WCU Energy Engn, Seoul 133791, South Korea

[3] Hanyang Univ, Dept Chem Engn, Seoul 133791, South Korea

来源：

JOURNAL OF POWER SOURCES | 2012年 / 220卷

基金：

新加坡国家研究基金会;

关键词：

Rate capability; 5 V spinel; Cathode; Co substitution; Lithium batteries; COATED LINI0.5MN1.5O4 SPINEL; ELECTROCHEMICAL PERFORMANCE; SECONDARY BATTERIES; X-RAY; MN; NI; MG; CR; LI; FE;

D O I：

10.1016/j.jpowsour.2012.07.104

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 synthesis and the structural and morphological characterization of micro-sized, spherical LiNi0.5-xCo2xMn1.5-xO4 powders are reported. The results demonstrate that these materials have a high electronic conductivity as well as a high tap density. We show that when tested in a lithium cell the Co-substituted LiNi0.5-xCO2xMn1.5-xO4 electrodes exhibited a better cycling performance and a better rate capability than the Co-free LiNi0.5Mn1.5O4 parent cells. The enhanced electrochemical performances are attributed to the increase in electrical conductivity and in structural stability caused by Co substitution for Ni and Mn and the mixed valence effect of Mn3+/Mn4+. Due to these properties, the LiNi0.5-xCo2xMn1.5-xO4 electrodes are believed to be of importance for the progress of the lithium battery technology. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：354 / 359

页数：6

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