Lithium-rich manganese-based materials (LMNC) have attracted extensive attention in lithium battery materials due to their high voltage platform and high specific capacity.The irreversible capacity loss and poor rate performance of LMNC materials during the first charge and discharge process were large problems.It was used by coating modification methods to improve material properties.Firstly,LMNC prepared by sol-gel method were coated with Nb2O5,SiO2 and lithium titanate,and passed laser particle size tester,XRD,SEM and other test methods.The macroscopic morphology and microstructure of the material were tested and characterized.Nb2O5 and SiO2 coating modification deteriorated the material properties.Lithium titanate coating modification increased the discharge specific capacity of the material by 10～20 mAh/g.
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