Influence of the Annealing Temperature to the Properties of LiNi0.5Mn1.5O4 High Voltage Spinel Cathode for Li-Ion Batteries

Abstract

High voltage cathode materials are one of the most promising ways for the next generation of cathode materials for the lithium-ion batteries. Thanks to their high potential and capacity comparable with standard cathode materials as LiCoO2 or LiFePO4, they can reach much higher gravimetric energy density. As for any other cathode material, good crystallinity after synthesis is also very important for high voltage materials to reach a good electrochemical performance during cycling. This paper deals with the influence of annealing temperature on electrochemical properties of high voltage spinel cathode LiNi0.5Mn1.5O4. It was studied at three different temperatures of the synthesis in terms of electrochemistry and structure by SEM and in term of electrochemistry by cycling at different C-rate.