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Study on the Electrochemical Performance of High Tap Density LiFePO4/C Synthesized by Spray-Drying

LiFePO4/C materials were synthesized by spray-drying using FePO4·2H2O, LiOH·H2O as raw materials, glucose as reducing agent and conductive additive. The morphology, structure and electrochemical properties of the LiFePO4/C were tested and analyzed. The morphology of the LiFePO4/C was biconcave and round looked similar to red blood cells, the tap density of the material up to 1.45g/cm3. The electrochemical performance of the material was excellent. The LiFePO4/C had an initial discharge specific capacity of 161.8mAh/g at rate of 0.1C and its specific capacities were 148.7, 120.9mAh/g at rates of 1, 5C rate, respectively. The discharge capacity remained at 95.8%, 81.7% after 500, 1000 cycles respectively at rate of 5C.