中文摘要：

根据LiCO3/MnO2混合粉体的热重-差热分析，利用Ozawa法计算出混合粉体反应过程中各个阶段的活化能，据此在不同的预热处理温度条件下合成出正极材料LiMn2O4，对LiMn2O4材料进行了X射线衍射分析、扫描电镜观察和电化学性能检测。优化了工艺参数，确定的最佳合成工艺参数为600℃预保温和830℃保温12h。该工艺合成的LiMn2O4粉体具有尖晶石结构和良好的形貌。组装成的电池在常温下循环时，初始放电容量为122（mA·h）／g，20次循环后容量保持在96％左右。

英文摘要：

Based on the analysis results of thermogravimetry-differential scanning calorimetry for the Li2CO3/MnO2 mixture powder, the activation energy during each reaction period was calculated by the Ozawa method. LiMn2O4 cathode materials were synthesized at different preheating treatment temperatures, and characterized by X-ray diffraction and scanning electron microscopy, and the electrochemical properties of the synthesized materials were determined. The optimum synthesis conditions are a preheating temperature of 600℃ and a synthesis temperature of 830℃ for 12 h. The Lign2O4 powder synthesized under the optimal conditions has a spinel structure and good morphology. The initial capacity of the LiMn204 cathode materials is 122 （mA·h）/g with a relatively high capacity for retention 96% after 20 cycles at room temperature.