Effect of Co content on performance of LiAl1/3-xCoxNi1/3Mn1/3O2 compounds for lithium-ion batteries

被引：33

作者：

Hu, Shao-Kang

Chou, Tse-Chuan ^{[1
]}

Hwang, Bing-Joe

Ceder, Gerbrand

机构：

[1] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan

[2] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan

[3] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[4] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF POWER SOURCES | 2006年 / 160卷 / 02期

关键词：

sol-gel method; first principle calculations; Co content; LiAl1/3-xCoxNi1/3Mn1/3O2;

D O I：

10.1016/j.jpowsour.2006.02.005

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：

Layered LiAl1/3-xCoxNi1/3Mn1/3O2 (0 <= x <= 1/3) compounds were studied via the combination of computational and experimental approach. The calculated voltage curve of LiNi1/3Al1/3Mn1/3O2 compound is presented, indicating it is of great potential for a cathode material of lithium-ion batteries. Unfortunately, it was found that the LiNi1/3Al1/3Mn1/3O2 compound without impurity phase could not be synthesized via a sol-gel process. To obtain a layered compound without impurity phase, partial of Al is replaced by Co in LiNi1/3Al1/3Mn1/3O2 compound in this study. Layered LiAl1/3-xCoxNi1/3Mn1/3O2 (0 <= x <= 1/3) compounds were synthesized via sol-gel reaction at 900 degrees C under a oxygen stream. Single phase of the LiAl1/3-xCoxNi1/3Mn1/3O2 in 1/6 <= x <= 1/3 region could be prepared successfully. The discharge capacity and conductivity increased with an increase in the Co-substitution content. The enhancement of the conductivity and phase purity by the introduction of Co content shows profound influence on the performance of the LiAl1/3-xCoxNi1/3Mn1/3O2 compounds. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1287 / 1293

页数：7

共 25 条

[1] Ab initio study of lithium intercalation in metal oxides and metal dichalcogenides [J].