Research Of Lifepo4/Acetylene Electrochemical Performance By Doping Moo3

Lithium iron phosphate (LiFePO4) containing low concentration 1 on dopan Is was prepared by mixing precursors with metal oxides (MoO3). The samples were characterized by X-ray diffraction,. cyclic voltammetry and scanning electron microscope, and their electrochemical performances were investigated including cycling behavior and current discharging. The results indicate that the Mo6+ dopant does not affect the structure of the material, but improves its kinetics in terms of capacity delivery and cycle performance in certain extent. The capability of LiFePO4 doped with 1.0% Mo calcined at 650 degrees C are better than that of samples calcined at 550 degrees C and 750 T. When batteries are cycled at a rate of 0.2 C, the charge and discharge curves show flat work voltages and large capacities, the first discharge capacity is 143 mAh(.)g(-1), after 50 cycles, the capacity of sample still possesses 129 mAh(.)g(-1) which shows preferable electrochemical performance. In addition, the sample doped with acetylene shows better capacity of 158 mAh(.)g(-1) in first discharge and stable cycleability by possessing 145 mAh(.)g(-1) after 50 cycles, the capacity fade is neglectable. When the charge-discharge rate is increased to 0.5 C and 1.0 C, the sample doped with acetylene shows capacity of 145 mAh(.)g(-1) and 130 mAh(.)g(-1), respectively.