Microwave synthesis of LiMg0.05Mn1.95O4 and electrochemical performance at elevated temperature for lithium-ion batteries

The microwave sintering method is used to synthesize the spinel LiMg_0.05Mn_1.95O₄ materials, and the structures and electrochemical performances of as-prepared powders are investigated. The powders resulting from the microwave synthesis are single crystalline phases with cubic spinel structure and exhibit outstanding structural stability. The discharge capacity and cycling stability of LiMg_0.05Mn_1.95O₄ are found to be superior with lower capacity fading over the investigated 100 cycles at elevated temperature (55 °C). The XRF and EIS measurements reveal that the doped LiMn₂O₄ synthesized by this simple method has lower dissolution of manganese into the electrolyte and higher electronic conductivity at high temperature for lithium ion batteries.