▎ 摘　　要

NOVELTY - Preparation of three-dimensional multi-channel hollow walnut-shaped vanadium dioxide-doped carbon composite material comprises adding vanadium salt, hexadecyltrimethylammonium bromide and reducing agent into a mixed solution of water and alcohol solvent, stirring for 1-12 hours, transferring into a reaction kettle, heating, reacting for 4-36 hours at 160-240 degrees C, cooling to room temperature, centrifuging, washing, and drying; and adding in an aqueous solution containing carbon source, heating and reacting for 4-36 hours at 160-240 degrees C, cooling to room temperature, centrifuging, washing, drying, and annealing under argon/hydrogen mixed atmosphere at 600-900 degrees C for 4-10 hours. USE - The method is used for preparing three-dimensional multi-channel hollow walnut-shaped vanadium dioxide-doped carbon composite material for preparing aqueous zinc-ion battery anode (claimed). ADVANTAGE - The composite material provides a large amount of electro-active sites, has large specific surface area and good conductivity, exhibits excellent high specific capacity and large current discharge performance, is environment-friendly, and has simple preparation method and high safety. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for aqueous zinc-ion battery comprising anode, metal zinc cathode, diaphragm and electrolyte. The anode is composed of electrode active material, conductive agent and adhesive. The electrode active material comprises three-dimensional multi-channel hollow walnut-shaped vanadium dioxide-doped carbon composite material. The conductive agent is graphene, carbon nanotube, acetylene black and/or SuperP. The adhesive is PTFE, polyvinylidene fluoride and/or sodium carboxymethyl cellulose. The adding mass percentage of the conductive is 5-15 wt.%. The adding mass percentage of the adhesive is 5-10 wt.%. The membrane is a porous glass fiber membrane. The electrolyte is zinc triflate, zinc chloride, zinc sulfate, and/or zinc acetate.