溶胶-凝胶法制备尖晶石锂锰氧正极材料

Preparation of LiMn_2O_4 by Sol-Gel Method and Its Properties

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.

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.