Electrochemical and structural properties of HT-LiCoO2 and LT-LiCoO2 prepared by the citrate sol-gel method

被引:95
作者
Kang, SG [1 ]
Kang, SY [1 ]
Ryu, KS [1 ]
Chang, SH [1 ]
机构
[1] Elect & Telecommun Res Inst, Microelect Technol Lab, Taejon 305600, South Korea
关键词
cathode materials; EXAFS; LiCoO2; lithium secondary battery; LT-LiCoO2;
D O I
10.1016/S0167-2738(98)00559-1
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
LT-LiCoO2 has a slightly modified structure but significantly different electrochemical properties compared to LiCoO2 prepared at high temperature. In this study, the structure and electrochemical properties of LT-LiCoO2 have been evaluated using Raman spectroscopy, X-ray absorption spectroscopy (XANES and EXAFS), and electrochemical. methods. According to the structural analysis, LT-LiCoO2 has an intermediate structure between a layered and a spinel structure. The first discharge capacity of LT-LiCoO2 is similar to 80 mAh/g (100 mu A/cm(2)). (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:155 / 161
页数:7
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