无机材料学报

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溶胶-凝胶法制备尖晶石锂锰氧正极材料

刘素琴; 路雁雁; 黄可龙   

  1. 中南大学化学化工学院功能材料化学研究所, 长沙 410083
  • 收稿日期:2004-10-20 修回日期:2004-12-31 出版日期:2005-11-20 网络出版日期:2005-11-20

Preparation of LiMn2O4 by Sol-Gel Method and Its Properties

LIU Su-Qin; LU Yan-Yan; HUANG Ke-Long   

  1. Institute of Functional Materials & Chemistry; School of Chemistry and Chemical Engineering; Central South University; Changsha 410083, China
  • Received:2004-10-20 Revised:2004-12-31 Published:2005-11-20 Online:2005-11-20

摘要: 以丙氨酸为螯合剂采用软化学法制备了锂锰氧化物.XRD分析结果表明所合成的产物为尖晶石型锰酸锂;采用SEM对产物的形貌进行了表征,结果表明所合成产物主要为棒状,且颗粒大小分布均匀.通过FT-IR及TG/DTA等手段初步探讨了产物的合成机理.采用循环充放电测试考察了产物的电化学性能,结果表明采用此法制备的产物具有优异的电化学性能.

关键词: LiMn2O4, 溶胶-凝胶, 电化学性能

Abstract: Lithium manganese oxide, as a cathode material for Li-ion battery, was prepared by the sol-gel method with Ala as a chelating agent. The powder samples were confirmed to be a single phase LiMn2O4 by X-ray diffraction (XRD) studies. The textural properties of the powder samples were examined by scanning electron microscope (SEM), showing that the powders mainly consist of rod-shaped particles with uniform particle sizes. The synthesis mechanism of LiMn2O4 was preliminarily investigated by FT-IR and TG-DTA etc. Electrochemical properties of the sample were evaluated with charge and discharge tests. The results show that the samples have excellent electrochemical properties.

Key words: LiMn2O4, sol-gel, electrochemical properties

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