您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 5    October 2003

[PDF Download]    [Flash Online]

    

Preparation of LiNi1-yCoyO2 in certain oxygen pressure
LI Hui(李 辉)1,2, ZHAI Yu-chun(翟玉春)1,TIAN Yan-wen(田彦文)1

1. School of Materials and Metallurgy,
Northeastern University, Shenyang 110004,China;
2. School of Petroleum and Chemical Engineering,
Liaoning University of Petroleum and Chemical Technology,
Shenyang 113001. China

Abstract:The LiNi1-yCoyO2 as cathode material of lithium ion battery was prepared by solid reaction at high temperature and oxygen pressure. The influences of the prepared conditions on electrochemical properties of products were discussed which include the pressure of oxygen, synthesis time and temperature as well as the molar ratio of the raw materials. The optimal synthetic conditions are as follows: reactive time is 8h and 10h; oxygen pressure is 0.20MPa;reactive temperature is 800℃;and molar ratio of the reactants is Li∶Ni∶Co =1.2∶0.9∶0.1. LiNi0.9Co0.1O2 was synthesized with the perfect crystal structure and the good electrochemical properties. Its discharged capacity is up to 189.4mAh/g. The results of X-ray diffraction and SEM analysis reveal that the product presents a layered structure of LiNiO2. The increase of the oxygen pressure during the reactive processes has important effects on the structure and electrochemical properties of the product.

 

Key words: lithium ion battery; cathode material LiNi1-yCoyO2; oxygen pressure; optimal synthetic condition

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn