Oxalate Coprecipitation Process Synthesis of 5 V Cathode Material LiNi0.5Mn1.5O4 and Its Performance

5 V cathode material LiNi0.5Mn1.5O4 was synthesized via an oxalate co-precipitation process. The synthesized product was characterized by XRD, SEM, charge/discharge test and cyclic voltammetry. XRD and SEM results indicate that the synthesized product LiNi0.5Mn1.5O4 has cubic spinel structure with space group of Fd 3 m, high crystallinity, moderate and uniform particle size. The electrochemical experiment results show that the LiNi0.5Mn1.5O4 has excellent performances. It has only one discharge plateau at around 4.7 V. 0.1 C discharge capacity is up to 133 mAh/g and retains above 128 mAh/g after 50 cycles, 1 C and 3 C discharge capacities after 30 cycles also retain above 122 mAh/g and 101 mAh/g, respectively.