Lithium rich manganese cathode material xLi2MnO3˙ (1-x) LiMO2 (M=Ni, Co, M) has the characteristics of high specific capacity (>250mAh/g), high working voltage, low cost, environmental friendliness, etc. It has attracted the attention of researchers in recent years and is considered as a strong competitor of the next generation of lithium ion battery cathode materials. The rapid development of mobile electronic equipment and electric vehicle industry has promoted the vigorous development of lithium-ion batter