Improvement of electrochemical performance of LiFePO_4 cathode materials for lithium-ion battery

LiFePO_4 and carbon-doped LiFePO_(4)were prepared by a novel solid-phase synthesis.The samples were characterized by X-ray diffraction,SEM,elemental analysis and electrochemical performances.These test results showed that the reaction conditions favored stabilization of samples as well as offered some control of the product morphology.Carbon-doped LiFePO_4 retained olivine structure and had good electrochemical performance.The results of electrochemical evaluation of the doped product showed a lithium insertion plateau around 3.5 V(vs.Li/Li~+) together with the initial charge specific capacity of 159.9 mAh·g~(-1) at 0.1C rate and with little specific capacity decay after 20 cycle at room temperature.