EDTA络合法制备锂离子电池正极材料Li_(1-x)K_xCoO_2  

Preparation of Lithium Battery Cathode Materials Li_(1-x)K_xCoO_2 by EDTA Complexing Method

作　　者：韩利华[1] 朱靖[2] 王岭[2] 郑水林[1] 高筠[1] 

机构地区：[1]中国矿业大学化学与环境工程学院,北京100083 [2]河北理工大学化工与生物技术学院,河北唐山063009

出　　处：《稀有金属材料与工程》2007年第A02期627-630,共4页Rare Metal Materials and Engineering

基　　金：河北省教育厅博士基金(2005346)

摘　　要：采用EDTA络合溶胶-凝胶法制备出锂离子电池正极材料Li_(1-x)K_xCoO_2,对Li_(1-x)K_xCoO_2的成胶条件和形成过程进行了探讨,并分别应用XRD、SEM等技术对材料的晶相、形貌等进行了结构表征。结果表明,在焙烧温度达到700℃时能够形成单一相的Li_(0.98)K_(0.02)CoO_2,焙烧12 h制得的Li_(0.98)K_(0.02)CoO_2粉体结晶良好,层状结构发育完善。充放电实验结果表明,在焙烧温度为800℃下制得的Li_(0.98)K_(0.02)CoO_2材料具有较好的电化学性能。Cathode material Li1-xKxCoO2 was prepared by sol-gel method with EDTA as coagulant. The forming condition and process of Li1-xKxCoO2 were discussed. The crystal phase and morphology of the material were characterized by XRD and SEM. The results show that single phase Li1-xKxCoO2 is formed when sintering temperature is up to 700 ℃ and the crystal sintered for 12 hours has layered structure. The charge and discharge experiments show that the crystal sintered at 800 ℃ has excellent electrochemical properties.

关 键 词：锂离子电池 溶胶 凝胶法 EDTA Li1-xKxCoO2 

分 类 号：TM912[电气工程—电力电子与电力传动]