微波合成LiCoO_2及其反应机理  

MICROWAVE SYNTHESIS OF LiCoO_(2) AND ITS REACTION MECHANISM

作　　者：于永丽[1] 翟秀静[2] 储刚[3] 王乃芝[1] 

机构地区：[1]东北大学理学院,沈阳110004 [2]东北大学材料冶金学院,沈阳110004 [3]辽宁石油化工大学分析测试研究中心,辽宁抚顺113001

出　　处：《硅酸盐学报》2005年第3期362-365,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50174016)资助项目

摘　　要：以Co3O4和LiOH·H2O为原料,微波反应合成了LiCoO2。考察了Co3O4和反应原料在微波场和普通加热时的反应行为。由X射线 衍射(X raydiffraction,XRD)和扫描电镜(scanningelectronmicroscope,SEM)观察对样品进行表征。XRD实验结果表明:Co3O4和反应物在 微波场和普通加热时的反应行为不同。在微波场中,在750℃Co3O4发生分解,Co3O4和LiOH·H2O反应生成LiCoO2的反应分两步完成。 采用普通加热时,Co3O4在900℃以下不发生分解,Co3O4和LiOH·H2O生成LiCoO2的反应一步完成。SEM观察表明,微波合成LiCoO2样 品颗粒边缘清晰、光滑。粒度分布实验表明:以样品中的粒子直径为1～12μm的颗粒个数计所得百分含量为98.05%。Samples of cathode material LiCoO2 for lithium ion battery were synthesized by microwave heating with Co3O4 and LiOH&middotH2O as starting materials. The behaviors of Co3O4 and reaction materials in microwave field and conventional heating were investigated. The as-prepared samples were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD results show that the behaviors of Co3O4 and the reaction materials in the microwave field and the conventional heating are different. Co3O4 decomposes at 750°C in the microwave field but no reaction is found in conventional heating until 900°C. LiCoO2 is synthesized in the microwave field through two-step reaction and in the conventional heating through one reaction. SEM tests show that the particles of the prepared samples are clear and smooth. Size distribution experiment shows that the content of the particle number with diameter of 1-12 μm in the powder is 98.05%.

关 键 词：微波加热 锂钴氧 反应机理 锂离子电池 正极材料 

分 类 号：TM119.47[电气工程—电工理论与新技术]