▎ 摘　　要

NOVELTY - Preparing graphene-coated metal-doped composite anode material comprises e.g. (i) rapidly heat-treating graphite oxide powder in air atmosphere, then adding concentrated acid and potassium permanganate to obtain exfoliated graphite, dispersing exfoliated graphite in deionized water and placing under ultrasonic conditions for 2-3 hours to obtain graphene oxide suspension, (ii) adding metal salt into organic solution and dissolving to obtain metal salt/solution system, (iii) mixing graphene oxide suspension with the metal salt/solution system, and then stirring at 150 degrees C for 4 hours, suction filtering to obtain metal-graphene composite precursor metal material, washing metal-graphene composite precursor with distilled water and absolute ethanol at pH 7 and drying at 110 degrees C for 1 hour to obtain metal-graphene composite material, and (iv) mixing metal-graphene composite material and anode material, and sintering by multi-stage constant temperature method, and crushing product and sieving. USE - The method is useful for preparing graphene-coated metal-doped composite anode material. ADVANTAGE - The anode material has synergistic effect. DETAILED DESCRIPTION - Preparing graphene-coated metal-doped composite anode material comprises (i) rapidly heat-treating graphite oxide powder in air atmosphere, then adding concentrated acid and potassium permanganate to obtain exfoliated graphite, dispersing exfoliated graphite in deionized water and placing under ultrasonic conditions for 2-3 hours to obtain graphene oxide suspension, (ii) adding metal salt into organic solution and dissolving to obtain metal salt/solution system, (iii) mixing graphene oxide suspension with the metal salt/solution system in a certain ratio, stirring at 80 degrees C for 6 hours, and then stirring at 150 degrees C for 4 hours, suction filtering to obtain metal-graphene composite precursor metal material, washing metal-graphene composite precursor with distilled water and absolute ethanol at pH 7 and drying at 110 degrees C for 1 hour to obtain metal-graphene composite material, and (iv) mixing metal-graphene composite material and anode material in a certain mass ratio, and sintering by multi-stage constant temperature method, and crushing product and sieving. An INDEPENDENT CLAIM is also included for graphene-coated metal-doped composite anode material obtained by above method.