Effects of different synthetic parameters on structure and performance of LiMn2O4 by adipic acid-assisted sol-gel method

The spinel lithium manganese oxide cathode materials were prepared by adipic acid-assisted sol-gel method at 350 similar to 900 degrees C in air. The effects of water content of solution, molar ratio between metal ion and adipic acid, cooling rate, synthesis temperature and particle sizes on structure and electrochemical performance of LiMn2O4 are investigated by X-ray diffraction (XRD), and cyclic voltammetry (CV). The result shows that the structure and electrochemical performance of LiMn2O4 are greatly affected by synthesis condition, and the optimal synthesis condition is determined. Charge-discharge test reveals that the particle size and cooling rate have significant effects on the electrochemical performance of LiMn2O4 cathode materials.