▎ 摘　　要

NOVELTY - Lithium-nickel-manganese-cesium oxide-based anode material (I) is new. (I) comprises an anode material matrix and a coating layer; the anode material matrix is internally doped with cesium, and the surface has a double coating layer formed by tantalum oxide and conductive nano-carbon material; the tantalum pentoxide is coated on the surface of the anode material matrix, and the conductive nano-carbon material is attached to the tantalum pentoxide; and the thickness of the double coating layer is 2.5-6 nm. USE - (I) is useful in solid-state batteries (claimed), preferably lithium-ion battery materials. ADVANTAGE - The method: prepares modified anode material, which has excellent rate performance and cycle performance; has simple steps, low production cost and less environmental pollution; and is suitable for industrial production. DETAILED DESCRIPTION - Lithium-nickel-manganese-cesium oxide-based anode material of formula (Li(NixMnyCsz)O2.mTaaOb-nC) (I) is new. (I) comprises an anode material matrix and a coating layer; the anode material matrix is internally doped with cesium, and the surface has a double coating layer formed by tantalum oxide and conductive nano-carbon material; the tantalum pentoxide is coated on the surface of the anode material matrix, and the conductive nano-carbon material is attached to the tantalum pentoxide; and the thickness of the double coating layer is 2.5-6 nm. x = 0.8-1; y = 0-0.2; z = 0-0.1; a = 0-5; b = 0-5; x + y = 1; and m, n = 0-0.05. An INDEPENDENT CLAIM is also included for modification method of anode material (I), comprises (i) mixing precursor material, lithium source, and cesium source and then sintering to obtain cesium-doped anode material, (ii) adding tantalum source into organic solvent, thoroughly mixing, adding cesium-doped anode material, then heating and stirring to obtain black slurry, (iii) vacuum drying and sintering the black slurry to obtain anode material I, and (iv) uniformly dispersing conductive nano-carbon material in organic solvent to obtain the mixture A, uniformly dispersing the anode material I in organic solvent to obtain the mixture B, mixing the mixture A and the mixture B, and ultrasonically acting for a period of time and then evaporating to obtain slurry, vacuum drying and sintering the slurry to obtain doped and double-coated modified anode material.