Electrochemical Porperties and Microstructure of C/LiFePO_4 Powders Prepared by Spray Pyrolysis

概要

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Spherical C/LiFePO_4 cathode powders were successfully prepared by spray pyrolysis. The saccharides such as monosaccharide and disaccharide or organic acid were used as carbon sources. SEM observation showed that they had spherical morphology with particle size of about 1μm. XRD analysis revealed that the olivine phase was obtained by heating at 700℃ under the atmosphere of argon/hydrogen (5%). Electrochemical measurement revealed that the rechargeable capacity of C/LiFePO_4 cathode was significantly improved by the addition of carbon. The use of sucrose was most effective for the high rechargeable capacity and cycle stability.