高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

微波-固相复合加热技术合成LiNi0.5Co0.5O2及其性能研究

杨书廷1,2, 岳红云1,2, 尹艳红1,2, 杨金鑫1,2, 杨伟光1,2, 王辉1,2   

    1. 河南师范大学化学与环境科学学院;
    2. 河南省新能源材料工程研究中心, 新乡 453007
  • 收稿日期:2005-11-10 修回日期:1900-01-01 出版日期:2006-11-10 发布日期:2006-11-10
  • 通讯作者: 杨书廷

Performances of Layered LiNi0.5Co0.5O2 Prepared by Microwave\|solid Phase Compound Heat Method

YANG Shu-Ting1,2, YUE Hong-Yun1,2, YIN Yan-Hong1,2, YANG Jin-Xin1,2, YANG Wei-Guang1,2, WANG Hui1,2   

    1. College of Chemistry and Environmental Science, Henan Normal University, Xinxiang 453007;
    2. New Material Research Center of Energy Source, Xinxiang 453007, China
  • Received:2005-11-10 Revised:1900-01-01 Online:2006-11-10 Published:2006-11-10
  • Contact: YANG Shu-Ting

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摘要： 用高分子分散及微波-固相复合加热技术合成了层状锂离子电池正极材料LiNi0.5Co0.5O2. 采用循环伏安、充放电循环、扫描电子显微镜(SEM)以及X射线粉末衍射(XRD)等测试技术, 研究了煅烧条件对材料微观形貌、相结构以及电化学性能的影响规律. 研究结果表明: 在750 ℃煅烧4 h即可得到形状为类球形的纯相层状LiNi0.5Co0.5O2正极材料, 该材料的最大放电容量达到154 mA·h/g, 循环10周后放电容量仍保持在148 mA·h/g以上.

关键词: 锂离子电池, 层状正极材料, 微波-固相烧结法, LiNi0.5Co0.5O2 

Abstract: Layered cathode materials for lithium ion batteries, LiNi0.5Co0.5O2, was prepared by microwave-solid phase compound heat method using polyacrylamide(PAM) as template. The effects of calcination temperature and time on the electrochemical performance, crystal structure and morphology of the materials were studied by using cyclic voltammetry, XRD, SEM techniques and charge-discharge test. The results show that the discharge capacity reaches 154 mA·h/g for the material(with pure layer structure) calcined at 750 ℃ for 4 h. And it was still above 148 mA·h/g after ten cycles. At the same time, morphology of the material synthesized under the same conditions was sphere-like, which contributed to increasing the density of electrode.

Key words: Lithium ion battery, Layered cathode material, Microwave-solid phase calcination method, LiNi0.5Co0.5O2

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