溶胶凝胶法合成富锂正极材料0.7Li_2MnO_3·0.3LiFe_(2/3)Ni_(1/3)O_2及其电化学性能研究  

Synthesis and electrochemistry characteristics of Li-rich cathode material 0.7Li_2MnO_3·0.3LiFe_(2/3)Ni_(1/3)O_2 by sol-gel method

作　　者：赵煜娟[1] 吴锐[1] 任文锋[1] 孙玉成[1] 岳影影[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《精细与专用化学品》2013年第7期35-39,共5页Fine and Specialty Chemicals

基　　金：北京市教育委员会科技创新平台面上项目(JC005012201101)

摘　　要：为了改善Fe-Mn富锂正极材料较差的循环性能,简化合成工艺,采用柠檬酸为螯合剂,溶胶凝胶法合成富锂正极材料0.7Li2MnO3·0.3LiFe2/3Ni1/3O2,并研究不同煅烧温度对于材料性质的影响。研究结果表明,550℃为最佳的煅烧温度,颗粒尺寸在50nm左右,在40mA/g初始放电容量可以达到179mAh/g,经过40次循环容量为166mAh/g。In order to improve the cycling performance of Fe-Mn based Li-rich cathode material and simplify the synthesis process,0.7Li2MnO3·0.3LiFe（2/3）Ni（1/3）O2 was synthetized using citric acid assisted as chelant by simple solgel technique,and effect of the different temperatures on the properties of this material was studied. The results showed that the optimum temperature is 550℃ . The material calcined at 550℃ exhibited the initial discharge capacity of 179mAh / g and the discharge capacity of 166mAh / g after 40 cycles at a current density of 40mA / g.

关 键 词：锂离子电池 富锂正极材料 溶胶凝胶法 

分 类 号：TM912[电气工程—电力电子与电力传动]