High-performance, nanostructure LiMnPO4/C composites synthesized via one-step solid state reaction

LiMnPO 4 is proposed as more promising cathode material as LiFePO 4 , while poor electronic conductivity and Jahn-Teller effects during charge/discharge processes hinder the electrochemical performance. To overcome these problems, one-step solid state reaction method is developed to synthesize LiMnPO 4 /C composites, which is with nanostructure , high crystallinity and good carbon coating. Manganese oxide sources and calcination temperature are investigated as factors for preparing high-performance LiMnPO 4 /C for Li-ion batteries. The results show that the LiMnPO 4 /C composites prepared with mixed manganese oxide deliver a superior initial capacity of 153   mAh   g −1 at 0.05   C and high rate performance with discharge capacities of 123   mAh   g −1 at 1   C and 103   mAh   g −1 at 2   C. And the LiMnPO 4 /C composites synthesized at 600 °C can retain 94% of the initial capacity after 200 cycles at 1   C, revealing a stable cycling stability. Therefore, one-step solid state reaction brings to light the synthesis of high performance LiMnPO 4 /C cathode materials and is suitable for large scale production.