The precursors of LiFePO4 were prepared by a sol-gel method using lithium acetate dehyd- rate, phosphoric acid, ferrous sulfate, and citric acid as raw materials. LiFePO4/C cathode material was synthesized by microwave method. The effect of different microwave time on the performance of the resulting LiFePO4/C was investigated. Structural characterization by X-ray diffraction and scann- ing electron microscopy proved that the phase LiFePO4 was synthesized under the optimal conditions of microwave 10 min(600W), the charge-discharge performance indicated that the LiFePO4/C had a maximal specific discharge capacity of 122.5 mAh•g-1 (0.1C) in the first cycle and improve capacity retention. Further AC impendence measurements indicate the sample produced by microwave 10 min shows the low charge transfer resistance.