LiMnPO4/C composites were synthesized via solid-state reaction with different carbon sources:sucrose,citric acid and oxalic acid.The samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and electrochemical performance test.The results of XRD reveal that carbon coating has no effect on the phase of LiMnPO4.The LiMnPO4/C synthesized at 600 ℃ with citric acid as carbon source shows an initial discharge capacity of 117.8 mAh·g-1 at 0.05 C rate.After 30 cycles,the capacity remains 98.2 mAh.g 1.The improved electrochemical properties of LiMnPO4/C is attributed to the decomposition of organic acid during the sintering process.