中文摘要：

以FeSO4·7H2O，NH4H2PO4和H2O2为初始原料，通过液相沉淀制得前驱体FePO4·2H2O，然后通过碳热还原得到LiFePO4／C。X射线衍射和扫描电镜分析结果表明：将FePO4·2H2O，Li2CO3与炭黑球磨2h后再在Ar气气氛、500℃下煅烧10h能得到无其他杂相的LiFePO4／C材料，反应剩余的碳黑分布在LiFePO4颗粒之间，阻碍LiFePO4颗粒团聚，并有利于提高其电子导电率；制得的LiFePO4／C的粒径为0．3～0．4μm，且具有良好的循环性能；以0．1C倍率电流放电的首次放电比容量为134．2mA·h／g，1C倍率下的放电比容量为104mA·h／g。

英文摘要：

LiFePO4/C powders were prepared by carbothermal reduction of Li2 CO3 with FePO4·H2O, which was synthesized by aqueous precipitation from solution of FeSO4·7H2O and NH4H2PO4 with H2O2 as the oxidizing agent. The samples were characterized by X-ray diffraction and scanning electron microscope. At first, the mixtures of FePO4·H2O and Li2CO3 and carbon were ball milled for 2 h, and then calcined at 500℃. Finally, the homogenous LiFePO4/ C was successfully synthesized with average particle size of 0.3 -0.4μm. The discharge capacity of the material synthesized under the optimum conditions is 134.2 mA·h/g at 0.1C rate and 104 mA· h/g at 1C rate. The residual carbon is coated on LiFePO4, preventing the aggregation of particles and resulting in the enhancement of the material＇s electronic conductivitv.