无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2013, Vol. 45 ›› Issue (6): 54-.

• 论文 • 上一篇    下一篇

锂离子电池正极材料LiNi0.5Co0.2Mn0.3O2 合成工艺优化

何爱珍,叶学海,郅晓科,赵 桢,王旭阳,章 甦,时 洁   

  1. 中海油天津化工研究设计院,天津 300131
  • 出版日期:2013-06-10 发布日期:2013-06-09

Optimization for synthesis technology of LiNi0.5Co0.2Mn0.3O2 lithium ion battery cathode material

HE  Ai-Zhen, YE  Xue-Hai, ZHI  Xiao-Ke, ZHAO   Zhen, WANG  Xu-Yang, ZHANG   Su, SHI   Jie   

  1. CNOOC Tianjin Chemical Research & Design Institute,Tianjin 300131,China
  • Published:2013-06-10 Online:2013-06-09

摘要: 以球形三元前驱体Ni0.5Co0.2Mn0.3(OH)2以及LiOH·H2O为原料,用正交实验优化锂离子电池正极材料LiNi0.5Co0.2Mn0.3O2合成工艺,考察烧结温度、保温时间以及锂与金属元素(Ni、Co、Mn总量)物质的量比等因素对材料电化学性能的影响。得到最佳条件:烧结温度为800 ℃,保温时间为12 h,锂与金属元素物质的量比为1.06。按最佳工艺合成的样品在0.2 C、1 C首次放电比容量分别为165.1 mA·h/g和151.6 mA·h/g,且表现出良好的循环稳定性。

关键词: Ni0.5Co0.2Mn0.3(OH)2, LiOH·, H2O, LiNi0.5Co0.2Mn0.3O2, 锂离子电池, 正极材料

Abstract: The synthesis technology of LiNi0.5Co0.2Mn0.3O2,a cathode material for lithium ion battery,was optimized by orthogonal experiment with Ni0.5Co0.2Mn0.3(OH)2,a spherical ternary precursor and LiOH·H2O as raw materials.The effects of calcination temperature,holding time,and the amount-of-substance ratio of lithium to metallic elements(total amounts of Ni,Co,and Mn)on the morphology and electrochemical performance of LiNi0.5Co0.2Mn0.3O2 were systematically investigated.The optimal process conditions were obtained as follows: calcination temperature was 800 ℃,holding time was 12 h,and amount-of-substance ratio of lithium to metallic elements was 1.06.The initial discharge capacities of samples prepared under the optimal conditions were 165.1 mA·h/g and 151.6 mA·h/g at 0.2 C and 1 C,respectively,and they also exhibited good cycling stability.

Key words: Ni0.5Co0.2Mn0.3(OH)2;LiOH·, H2O;LiNi0.5Co0.2Mn0.3O2;lithium ion battery;cathode material

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