高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (3): 462.

• 论文 • 上一篇    下一篇

高电导率LiAl0.3Co0.7-xMgxO2的制备与表征

李畅, 徐晓光, 孟醒, 王春忠, 杜菲, 景岩, 黄桂春, 陈岗   

  1. 吉林大学材料科学与工程学院, 教育部汽车材料重点实验室, 长春 130023
  • 收稿日期:2002-05-27 出版日期:2003-03-24 发布日期:2003-03-24
  • 通讯作者: 陈岗(1958年出生),男,博士,教授,博士生导师,长江学者,从事材料物理与化学研究.
  • 基金资助:

    教育部博士学科点基金(批准号:20010183031);国家自然科学基金(批准号:50272023)资助

Synthesis and Characterization of LiAl0.3Co0.7-xMgxO2 with High Electrical Conductivity

LI Chang, XU Xiao-Guang, MENG Xing, WANG Chun-Zhong, DU Fei, JING Yan, HUANG Gui-Chun, CHEN Gang   

  1. College of Materials Science and Engineering, Key Laboratory of Automobile Materials of Ministry of Education, Jilin University, Changchun 130023, China
  • Received:2002-05-27 Online:2003-03-24 Published:2003-03-24

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摘要： 用柠檬酸配位聚合法合成了LiAl0.3Co0.7-xMgxO2(x=0.01～0.13)粉体,并进行了X射线衍射(XRD)和透射电子显微镜(TEM)的表征.结果发现晶粒粒径都小于1μm,且在x≤0.11的范围内,材料的XRD谱峰形锐利,表明800℃下材料有良好的结晶性,通过对几组衍射峰的标定,确定材料保持了六方层状α-NaFeO2结构,这种结构在充放电过程中为锂离子提供了良好通道.

关键词: LiAl0.3Co0.7-xMgxO2, XRD, TEM, 电导

Abstract: A series of LiAl0.3Co0.7-xMgxO2(x=0.01-0.13) powders were synthesized and characterized by XRD and TEM measurements. The results show that the crystal size is under 1 μm. When x≤0.11, the peaks in the XRD patterns are very sharp which indicate that the materials are well crystallized. After indexing the peaks, it was confirmed that the materials formed an α-NaFeO2 structure which ensured the lithium ions pass fluently during the charge-discharge process.

Key words: LiAl0.3Co0.7-xMgxO2, XRD, TEM, Electrical conductivity

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