Influence of cerium doping on structure and electrochemical properties of LiNi0.5Mn1.5O4 cathode materials

First charge-discharge curves at 0.2C rate (a) and discharge curves at different rates (b) of LiCexNi0.5-xMn1.5O4 (x=0, 0.005, 0.01, 0.02) cathode materials