Anode material of rich-lithium-manganese-based mixed conductor and preparation method of anode material

The invention relates to an anode material of a rich-lithium-manganese-based mixed conductor and a preparation method of the anode material. The anode material of the mixed conductor comprises Xli2 MnO3.(1-X) LiMn 1/3Ni 1/3 Co1/3O2 (x is equal to =0.1-0.5), FeF3 and CNTs. The preparation method of the anode material comprises the steps as follows: 70%-90% of the rich-lithium-manganese-based solid solution Xli2 MnO3..(1-X) LiMn 1/3Ni 1/3 Co1/3O2, 5%-25% of the FeF3 and 1%-10% of the CNTs (added in a CNTs conductive liquid mannerform) are subjected to high-energy ball milling mixing and annealing in a mass percentage, so that the anode material of the rich-lithium-manganese-based mixed conductor of a lithium ion battery is obtained. The prepared anode material of the rich-lithium-manganese-based mixed conductor has high ionic conductivity and electronic conductivity, the specific discharge capacity reaches 270 m Ah/g for the first time, the charge and discharge coulombic efficiency reaches as high as 90% for the first time, and the anode material has excellent rate performance and cycling stability.