New molten salt synthesis of LiNi_0.5Mn_1.5O₄cathode material

A new molten salt method is designed to synthesize spinel LiNi 0.5 Mn 1.5 O 4 cathode material, and the reaction medium NaCl is in situ formed in the process of precursor preparation via room temperature solid-state reactions. Pure LiNi 0.5 Mn 1.5 O 4 can be successfully synthesized at 950 °C in an open alumina crucible in air and a further rise in heating temperature leads to the appearance of a small amount of impurity. Electrochemical test shows that the LiNi 0.5 Mn 1.5 O 4 obtained at 1000 °C has the best electrochemical performance and can deliver a high capacity of 134 mAh g −1 with excellent cycling stability.