摘要
采用溶胶-凝胶法制备了锂离子电池正极材料锂锰氧化物。以Mn（NO3）2（50％）、Li0H·2H2O为原料，以柠檬酸为螯合剂制得前驱体，400℃预烧6h，再经750、850℃分别焙烧并保温6h得到粉体产物。XRD分析表明，所合成的产物为尖晶石型LiMn204；SEM观察结果表明，合成产物颗粒均匀，形貌规则。用其组装的电池经恒电流充放电测试，表明其初始比容量可达118．76mAh／g，具有良好的循环性能。
Lithium manganese oxide, a type of cathode materials for Li-ion battery was prepared by sol-gel method ,using Mn （NO3）2 （50%）,LiOH ·2H2O as raw materials and citric acid as the chelating agent. The precursor was preheated at 400℃ for 6 h, and then calcined at different temperature of 750,850 ℃ for 6 h to obtain the powder. The as-prepared sample was confirmed to be spinel LiMn204 by X-ray diffraction（XRD）. Scanning electron microscope （SEM）images showed that the powder mainly consist- ed of rod-shape particles with uniform particle sizes. The electrochemical properties of the sample were evaluated with charge and discharge tests. The specific capacity of the LiMn2O4 cathode materials was 118.76 mAh/g which indicated a good cycling performance.
出处
《中国粉体技术》
CAS
北大核心
2009年第4期49-51,共3页
China Powder Science and Technology
基金
甘肃省高校硕士研究生导师基金,编号:0703-03
关键词
正极材料
溶胶-凝胶法
电化学性能
cathode materials
sol-gel method
electrochemical property
