Synthesis and Performance of Cathode Material Li_3V_2(PO_4)_3/C by Spray Drying and Carbothermal Method(SDATM)

Li-ion battery cathode material Li3V2(PO4)3/C composite was successfully prepared by spray drying and carbothermal method(SDCTM).The effect of spray drying was carefully studied.The structural,morphological and electrochemical properties were investigated by means of XRD,SEM,TEM and constant current charge-discharge cycling.The results indicate that the sample prepared with spray drying twice at 260℃ and subsequent heat-treating at 750℃ for 12h has better performance.Its average particle size is under 0.5μm.It presents large reversible discharge capacity of 121.9,114.6 and 104.6mAh·g-1 and excellent capacity retention rate closed to 100% after 50 cycles at C/5,1C and 5C rate,respectively at the room temperature.