Low-temperature performance of the Li[Li0.2Co0.4Mn0.4]O2 cathode material studied for Li-ion batteries

被引：1
|
作者：
Wang, Yuhui [2 ]
Li, Zhe [2 ]
Zhu, Kai [1 ]
Li, Gang [1 ]
Wei, Yingjin [1 ]
Chen, Gang [1 ]
Wang, Chunzhong [1 ]
机构：
[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
[2] Jilin Univ, Coll Mat Sci & Engn, Changchun 130012, Peoples R China
来源：
RENEWABLE AND SUSTAINABLE ENERGY, PTS 1-7 | 2012年 / 347-353卷
关键词：
Cathode material; low temperature; electrochemical kinetics; CV; LITHIUM BATTERIES; MN;
D O I：
10.4028/www.scientific.net/AMR.347-353.3662
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The Li[Li0.2Co0.4Mn0.4]O-2 cathode material was prepared by a sol-gel method. Combinative X-ray diffraction (XRD) studies showed that the material was a solid solution of LiCoO2 and Li2MnO3. The material showed a reversible discharge capacity of 155.0 mAhg(-1) at -20 degrees C, which is smaller than that at room temperature (245.5 mAhg(-1)). However, the sample exhibited capacity retention of 96.3 % at -20 degrees C, only 74.2 % at 25 degrees C. The good electrochemical cycle performance at low temperature was due to the inexistence of Mn3+ in the material.
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收藏
页码：3662 / +
页数：2
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