Improvement of the Electrochemical Performance of LiFePO4 Cathode Composite Material Using a In Situ Pyrolysis Carbon Synthesis Procedure
LiFePO4/Carbon composite cathode material was prepared by pelleting and subsequent pyrolytic cracking process in N2 atmosphere with carbon source of polyvinyl alcohol (PVA). XRD crystal analysis indicates that single LiFePO4 phase and amorphous carbon can be found in the products. SEM observation shows a special micro-morphology of sample, which is favorable for enhancement of electrochemical properties. The discharge capacity of the LiFePO4/C composite was 135 mAh/g, close to the charge capacity of 153 mAh/g at low rate of 0.1C. At 0.2C, the specific capacity was about 117.4 mAh/g, which is satisfied for power source of Electric Vehicle for its flat discharge platform.
Wei Pan and Jianghong Gong
S. H. Luo et al., "Improvement of the Electrochemical Performance of LiFePO4 Cathode Composite Material Using a In Situ Pyrolysis Carbon Synthesis Procedure", Key Engineering Materials, Vols. 336-338, pp. 466-469, 2007