以不同锂盐与柠檬酸铁为原料,采用溶胶-凝胶法制备LiFePO4,并讨论在前躯体中加入表面活性剂对LiFePO4性能的影响。结合XRD、SEM和充放电测试等手段对材料性能进行表征。结果表明,表面活性剂可以抑制杂质相Li4P2O7的出现,得到颗粒尺寸较小的LiFePO4,在0.1C倍率下其首次放电比容量可达123.5mAh/g,循环10次后容量仅衰减2.4%。 LiFePO4 was prepared by sol-gel method using different lithium salts and ferric citrate as raw materials, and the effect of adding surfactant on the properties of LiFePO4 was discussed. The material properties were characterized by XRD, SEM and charge-discharge test. The results showed that surfactant could inhibit the appearance of impurity phase Li4P2O7 and get LiFePO4 with smaller particle size. The specific discharge capacity of LiFePO4 reached 123.5mAh / g at 0.1C rate and only 2.4% after 10 cycles.