无机材料学报

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喷雾干燥法制备LiCoO2超细粉

李阳兴; 姜长印; 万春荣; 朱永(贝睿)   

  1. 清华大学核能技术设计研究院 北京 100084
  • 收稿日期:1998-09-21 修回日期:1998-11-03 出版日期:1999-08-20 网络出版日期:1999-08-20

Synthesis of Ultrafine LiCoO 2 Powders by Spray Drying Method

LI Yang-Xing, JIANG Chang-Yin, WAN Chun-Rong, ZHU Yong-Jun   

  1. Institute of Nuclear Engineering & Technology; Tsinghua University Beijing 100084 China
  • Received:1998-09-21 Revised:1998-11-03 Published:1999-08-20 Online:1999-08-20

摘要: 本文研究了一种新型的制备锂离子电池正极材料的工艺方法通过喷雾干燥法制备出 Li Co O2超细粉试验中, 进行了混合粉体的 D T A/T G A 分析; X R D 谱分析显示, 所得 Li Co O 为具有α- Na Fe O 层状结构的 H T-Li Co O ; 从 S E M 照片可见, Li Co O 粉末元素分布均匀, 粒径为几百纳米;电化学性能测试结果表明, 其充电容量为148m A·h/g , 放电容量为135m A·h/g, 具有优良的电化学性能.

关键词: LiCoO2, 电化学性能, 喷雾干燥法

Abstract: A novel technique was studied to prepare cathode materials for lithium-ion battery. Ultrafine LiCoO2 powders were synthesized by a spray drying method. DTA/TGA
were employed to analyze the mixed powders. XRD results show that the prepared LiCoO2 is HT-LiCoO2 which has α-NaFeO2 structure type. SEM photographs
show that the powders are homogeneous with grain size of hundreds of nanometer. Electrochemical property experiments testify that the powders have excellent
electrochemical properties with initial charge capacity of 148mAh/g and discharge capacity of 135mAh/g. Its prospect of industrialization is attractive.

Key words: LiCoO2, electrochemical property, spray drying method

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