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%）、LiOH·2H₂O 为原料，以柠檬酸为螯合剂制得前驱体， 400 ℃预烧 6 h， 再经 750、850 ℃分别焙烧并保温 6 h 得到粉体产物。 XRD 分析表明， 所合成的产物为尖晶石型 LiMn₂O₄；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 118.76 mAh/g，具有良好的循环性能。 

关键词：正极材料；溶胶-凝胶法；电化学性能

Abstract：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 LiMn₂O₄ 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. 

Keywords：cathode materials；sol－gel method；electrochemical property