Influence of synthesis temperature on electrochemical performance of polyoxomolybdate as cathode material of lithium ion battery

In order to improve the electrochemical performance of polyoxomolybdate Na3[AlMo6O24H6](NAM) as the cathode material of lithium ion battery, the NAM materials with small particle size were synthesized by elevating the synthesis temperature in the solution. The as-prepared NAM materials were investigated by FT-IR, XRD, SEM and EIS. Their discharge-charge and cycle performance were also tested. The results show that the particle size decreases to less than 10 µm at the temperature of higher than 40 °C. When synthesized at 80 °C, the NAM with the smallest particle size (∼3 µm) exhibits the best electrochemical performance such as high initial discharge capacity of 409 mA·h/g and coulombic efficiency of 95% in the first cycle at 0.04C.