Spinel LiMn2O4 was synthesized via solid state process with different raw materials. The phase identification, surface morphology and electrochemical properties of the synthesized powders were characterized with x-ray diffraction, scanning electron micrograph, cyclic voltammetry and galvanostatic charge-discharge experiments. LiMn2O4 powders prepared by Mn3O4 shows better crystallization than the one prepared by electrolytic MnO2(EMD). The specific capacity of LiMn2O4 prepared by Mn3O4 is 128.7mAh/g, which is slightly higher than that of 123.7mAh/g for LiMn2O4 prepared by electrolytic MnO2. The capacity retention of the LiMn2O4 prepared by Mn3O4 after being cycled 30 times at room temperature and room temperature of 55℃ is 98.4% and 85.0% respectively, which are much higher than the values of 91.03% and 80.3% for the one prepared by electrolytic MnO2. Preparation of LiMn2O4 by Mn3O4 can not only improve the specific capacity but also significantly increase the cycle performance and high temperature performance.