Improving Electrochemical Performance of LiFePO₄ as a Cathode Material

LiFePO₄ was synthesized by solid state reaction. A reversible capacity of 125-138 mAh/g was achieved under a low current density of 20 mA/g at room temperature. In order to improve the electrochemical performance of the material, Li(Fe_0.8Mn_0.2)PO₄ and LiFePO₄/C were prepared, respectively. The charge-discharge experiment of the samples showed that the capacities were 145 mAh/g and 144 mAh/g, respectively. They both had a good voltage plateau and exhibited wonderful high current properties.