高温固相法制备锂离子电池正极材料LiFePO4/C

Using the protecting-envionment meterials LiH2PO4 as the source of Li and FeC2O4 as the source of Fe, LiFePO4 /C composite cathode materials were synthesized through presintering meterials for 6 h and sintering the meterials for 16 h by high temperature solid state method in an inert atmosphere.Make the study on the properties of LiFePO4 /C using the method of Constant Current Charge-discharge , Cyclic Voltammogram (CV), electrochemistry Impedance Spectra(EIS). The results of the Constant Current Charge-discharge test demonstrate that the initial charge-discharge capacity, namely 138.36 and 126.7 mAh /g, were obtained at room temperature and 0. 1C charge-dischange rate. After 20 cycles, the discharge capacity was 111.42mAh /g,The capacity retains 87.94%.