Synthesis and electrochemical characteristics of layered LiNi0.6Co0.2Mn0.2O2 cathode material for lithium ion batteries

被引:115
|
作者
Cao, H [1 ]
Zhang, Y [1 ]
Zhang, H [1 ]
Xia, BJ [1 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Dept Energy, Shanghai 200050, Peoples R China
关键词
lithium ion batteries; cathode materials; Co-precipitation; LiNi0.6Co0.2Mn0.2O2;
D O I
10.1016/j.ssi.2005.02.023
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
LiNi0.6Co0.2Mn0.2O2 was prepared from LiOH - H2O and Me(OH), (Me Ni, Co, Mn) by co-precipitation and subsequent heating in air. XRD, SEM and C-V methods were used to examine the structural and electrochemical characteristics. LiNi0.6Co0.2Mn0.2O2 samples showed excellent electrochemical performances. The optimum annealing range is 800-900 degrees C. The reversible discharge capacity after 50 cycles of a sample heated at 900 degrees C is 151.6 mAh/g at RT when a cell (LiNi0.6Co0.2Mn0.2O2/Li) is cycled in 2.8-4.3 V at 0.4 C rate. Cylinder batteries (LiNi0.6Co0.2Mn0.2O2/C) were assembled. It was found that LiNi0.6Co0.2Mn0.2O2 shows excellent cycling stability at RT when cycled in 2.8-4.2 V at 0.2 C, 0.5 C, and 1 C, respectively. A C-V test showed only one couple of peaks that appeared between 3.2-4.6 V in a LiNi0.6Co0.2Mn0.2O2/Li cell, which means that a more reversible specific charge/discharge capacity is available for this material. LiNi0.6Co0.2Mn0.2O2 was tested to be a promising cathode material for lithium ion batteries. (c) 2005 Elsevier B.V All rights reserved.
引用
收藏
页码:1207 / 1211
页数:5
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