▎ 摘　　要

NOVELTY - An anode active material comprises lithium-manganese-iron- phosphorus-oxide/graphene composite material, where the composite material is core-shell structure, and the graphene content is 0.1-10 wt.% as a reference material. USE - Anode active material for use in a lithium ion battery. ADVANTAGE - The anode active material has high capacity and better circulation property. DETAILED DESCRIPTION - An anode active material comprises lithium-manganese-iron- phosphorus-oxide (LiMnxFeyRe11-x-yPO4)/graphene composite material, where the composite material is core-shell structure, the x is 0.20-0.80, the y is 0.20-0.80, the Re1 is selected from lanthanum, cerium, praseodymium, neodymium, promethium, samarium, yttrium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and europium, and the graphene content is 0.1-10 wt.% as reference material. An INDEPENDENT CLAIM is included for the following: (1) a method for a method for preparing anode active material, which involves mixing iron salts, manganese salts, rare earth-doped source and phosphate source and graphene-containing solution containing a lithium salt to obtain a mixed solution, subjecting the mixed solution to hydro-thermal reaction at 120-220 degrees C to obtain a reaction product, followed by pre-sintering the reaction product at 300-600 degrees C to obtain a finished product (2) a lithium ion battery anode material comprising electric conduction substrate and electric conduction basal body.