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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 4    August 2005

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Synthesis of LiCoxNi1-xO2 cathode materials from electrolysis Co-Ni alloys
YE Mao(叶 茂)1, WEI Jin-ping(魏进平)1, CAO Xiao-yan(曹晓燕)2
ZHAI Jin-ling(翟金玲)1, WANG Xiao-yu(王晓宇)1
SUN Xin(孙 欣)

1. Institute of New Energy Material Chemistry, Nankai University, 
Tianjin 300071, China; 
2. College of Chemistry and Chemical Engineering, Ocean University of China, 
Qingdao 266003, China

Abstract: The LiCoxNi1-xO2 (x=0.2, 0.5 and 0.8) cathode materials were synthesized by sintering the mixtures of lithium salt and CoxNi1-x(OH)2 (x=0.2, 0.5 and 0.8) which were achieved from corresponding CoxNi1-x alloys by electrolysis technique. The structure and electrochemical characteristics of the obtained LiCoxNi1-xO2 were studied by XRD, SEM, PSCA and charge-discharge cycling test. The results show that the electrochemical capacities of the LiCoxNi1-xO2 (x=0.2, 0.5 and 0.8) materials are improved with the increase of the Ni content. The electrochemical performance of LiCo0.2Ni0.8O2 made in oxygen atmosphere has higher charge-discharge capacity and better cycleability compared with the one made in air atmosphere.

 

Key words: cathode materials; electrolysis; LiCoxNi1-xO2; Co-Ni alloys  

ISSN 1672-7029
CN 43-1423/U

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