Synthesis and electrochemical properties of Li_(1-x)V_xCr_yFe_(1-x)PO_4/C as a cathode material

摘要

Composites Li_(1-x)V_xCr_yFe_(1-y)PO_4/C (x=0.01,0.02;y=0.01,0.02) were synthesized by solid-state reaction method.The influence of the content of doping vanadium and chromium on the structure of Li_(1-x)V_xCr_yFe_(1-y)PO_4/C was investigated by XRD, while the morphology of powders was observed by SEM.The investigation of the electrochemical performances showed that the Li_(0.99)V_(0.02)Cr_(0.02)Fe_(0.98)PO_4/C material has a higher capacity.At 0.1 C discharging rate,it is capable of delivering reversible specific capacity of 163.8 mAh/g with fairly stable cycleability.