The effects of quenching treatment and AlF3 coating on LiNi0.5Mn0.5O2 cathode materials for lithium-ion battery

被引：44

作者：

Lin, Hecheng ^{[1
,2
,3
]}

Zheng, Jianming ^{[1
,2
]}

Yang, Yong ^{[1
,2
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China

[3] Hunan Univ Sci & Engn, Dept Biol Sci & Chem Engn, Yongzhou 425006, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 119卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Quenching methods; LiNi0.5Mn0.5O2; High rate performance; Surface coating; Lithium-ion batteries; ELECTROCHEMICAL PERFORMANCE; SIGNIFICANT IMPROVEMENT; ELECTRODES; BEHAVIOR;

D O I：

10.1016/j.matchemphys.2009.10.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Submicron layered LiNi0.5Mn0.5O2 was synthesized via a co-precipitation and solid-state reaction method together with a quenching process. The crystal structure and morphology of the materials were investigated by X-ray diffraction (XRD), Brunauer-Emmett and Teller (BET) surface area and scanning electron microscopy (SEM) techniques. It is found that LiNi0.5Mn0.5O2 material prepared with quenching methods has smooth and regular structure in submicron scale with surface area of 0.43 m(2) g(-1). The initial discharge capacities are 175.8 mAh g(-1) at 0.1 C (28 mA g(-1)) and 120.3 mAh g(-1) at 5.0 C (1400 mA g(-1)), respectively, for the quenched samples between 2.5 and 4.5 V. It is demonstrated that quenching method is a useful approach for the preparation of submicron layered LiNi0.5Mn0.5O2 cathode materials with excellent rate performance. in addition, the cycling performance of quenched-LiNi0.5Mn0.5O2 material was also greatly improved by AlF3 coating technique. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：519 / 523

页数：5

共 29 条

[1] Influence of carbon coating on the performance of a LiMn0.5Ni0.5O2 cathode [J].