Synthesis and Electrochemical Properties of LiFePO 4 by Citrate Process

is a promising cathode material for secondary lithium batteries due to its high energy density, low cost and safety. was synthesized by the citrate process under reductive, neutral, and oxidative, atmospheres and the crystal structure was analyzed by X-ray powder diffraction. The samples synthesized under and atmosphere showed a single phase of a olivine structure, where the samples synthesized under atmosphere exhibited second phase of . All the samples synthesized at 400, 600 and under atmosphere presented a single phase of olivine. Residual organic material was observed for the sample synthesized at . There was nearly no intensity difference between the samples synthesized at and . The electrochemical characteristic of the synthesized at in the atmosphere was analyzed. The result exhibited an high discharge capacity of 160 mAh/g at the first cycle, and 155-160 mAh/g after 45 cycles.