东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (3): 266-269.DOI: -

• 论著 • 上一篇    下一篇

微波合成LiCoO_2及其结构表征

于永丽;翟秀静;王云霞;姚广春   

  1. 东北大学理学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-03-15 发布日期:2013-06-24
  • 通讯作者: Yu, Y.-L.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(编号:50174016)·

Microwave synthesis of LiCoO2 and its characterization

Yu, Yong-Li (1); Zhai, Xiu-Jing (2); Wang, Yun-Xia (2); Yao, Guang-Chun (2)   

  1. (1) Sch. of Sci., Northeastern Univ., Shenyang 110004, China; (2) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-03-15 Published:2013-06-24
  • Contact: Yu, Y.-L.
  • About author:-
  • Supported by:
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摘要： 以Co2O3和LiOH·H2O为原料,微波加热合成锂离子电池正极材料LiCoO2·考察了微波输出功率、微波加热时间及保温时间对产物结构和组成的影响,用XRD实验对所得产品进行表征·结果表明,当微波输入功率为360W,加热时间为10min,保温时间为10min时,产品是单一相层状结构LiCoO2,晶格常数和标准值一致·SEM实验显示,该反应条件下制备LiCoO2样品颗粒边缘清晰、光滑,颗粒度约为5μm,粒度分布较均匀·对LiCoO2的微波合成机理进行了探讨,结合XRD实验,说明Co2O3和LiOH·H2O反应生成LiCoO2分两步完成·

关键词: 微波合成, LiCoO2, 锂离子电池, 正极材料

Abstract: LiCoO2 powder as cathode material in lithium ion battery was synthesized by microwave heating using Co2O3 and LiOH·H2O as raw materials. The effects of microwave power output, heating time and holding time on the microstructure and composition of synthesized powder were investigated. XRD results show that the samples of single-phase layered LiCoO2 can be obtained with lattice constants confirming with reference values if the power output is 360 W and heating time and holding time are both 10 min. SEM images show that the LiCoO2 samples prepared under such conditions are featured with clear and smooth grain boundaries and evenly distributed grain size which is about 5 μm on an average. The microwave synthesis mechanism of LiCoO2 is discussed in combination with XRD results, indicating that the whole synthesis process is a two-step reaction. In addition, TGA-DTA tests were carried out for the raw materials.

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