▎ 摘　　要

NOVELTY - A three-dimensional porous graphene doped lithium titanate composite anode material preparation method involves dispersing the three-dimensional porous graphene in a solvent. Lithium source compound and titanium source compound are uniformly distributed on the obtained three-dimensional porous graphene solution to obtain a three-dimensional porous graphene and lithium titanate precursor sol-gel. The sol-gel is dried to remove solvent to obtain a three-dimensional porous graphene and lithium titanate precursor powder. The precursor powder is heated. USE - Method for preparing a three-dimensional porous graphene doped lithium titanate composite anode material. ADVANTAGE - The method enables preparing the anode material in an effective manner with high specific surface area, thus improving ratio property and cyclic performance of the lithium titanate. The method enables effectively restraining the gathering of lithium titanate particles during heat treatment process by the introduction of carbon nano material, thus increasing diffusion coefficients of lithium-ions in the carbon nano material doped lithium titanate composite material. DETAILED DESCRIPTION - A three-dimensional porous graphene doped lithium titanate composite anode material preparation method involves dispersing the three-dimensional porous graphene in a solvent to prepare a three-dimensional porous graphene solution (1-12 mg/ml). Lithium source compound and titanium source compound are uniformly distributed on the graphene solution to obtain a three-dimensional porous graphene and lithium titanate precursor sol-gel, where the ratio of the titanium source compound and the lithium source compound is (0.7-0.9):1. The precursor sol-gel is dried to remove solvent at 70-90 degrees C to obtain a three-dimensional porous graphene and lithium titanate precursor powder. The precursor powder is heated to 700-950 degrees C for 8-20 hours under the protection of inert gas to obtain a three-dimensional porous graphene doped lithium titanate composite material, where the content of the three-dimensional porous graphene is 1-5 wt.%.