中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 15 No. 4 August 2005 |
ZHAI Jin-ling(翟金玲)1, WANG Xiao-yu(王曉宇)1,
SUN Xin(孫 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
