Li4/3Ni1/3Mo1/3O2 - LiNi1/2Mn1/2O2 Binary System as High Capacity Positive Electrode Materials for Rechargeable Lithium Batteries

被引：7

作者：

Zhao, Wenwen ^{[1
]}

Yamaguchi, Kazuma ^{[1
]}

Sato, Takahito ^{[1
]}

Yabuuchi, Naoaki ^{[1
]}

机构：

[1] Tokyo Denki Univ, Dept Appl Chem, Adachi Ku, Tokyo 1208551, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 07期

基金：

日本科学技术振兴机构;

关键词：

STATE REDOX REACTION; ELECTROCHEMICAL PROPERTIES; 3-DIMENSIONAL VISUALIZATION; CRYSTAL-STRUCTURE; OXIDE IONS; INTERCALATION; LINIO2; LICOO2; CATHODES; ORIGIN;

D O I：

10.1149/2.0661807jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A binary system of x Li4/3Ni1/3Mo1/3O2 - (1-x) LiNi1/2Mn1/2O2 is studied as high-capacity positive electrode materials for rechargeable lithium batteries. Structural and electrochemical properties of oxides with different compositions in this binary system are examined. Mo ordering is retained for 1 <= x <= 1/3 with a monoclinic symmetry and disappears for x <= 1/6 with a rhombohedral symmetry. Compared with Li4/3Ni1/3Mo1/3O2, partial substitution of Mn for Mo lead to the improvement of reversible capacity and reduction of polarization. For Li6/5Ni2/5Mn1/5Mo1/5O2 (x = 1/3) and Li9/8Ni7/16Mn5/16Mo1/8O2 (x = 1/6), high reversible capacities of around 200 mAh g(-1) are obtained. Improved cycling performance is achieved through the optimization of voltage ranges. Further structural characterization by ex-situ XRD reveals that the improved reversibility for the Mn-substituted samples mainly results from the suppression of Mo migration during cycling, probably associated with partial oxygen loss. (C) The Author(s) 2018. Published by ECS.

引用

页码：A1357 / A1362

页数：6

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