▎ 摘　　要

NOVELTY - An ultrathin interface modified zinc metal negative electrode material is zinc-containing metal material containing a functionalized graphene protective layer deposited on its surface. The thickness of the functionalized graphene protective layer is 20 nm to 3 microm. The functionalized graphene is graphene doped with 1-3 %mass heteroatoms e.g. nitrogen, phosphorus or sulfur. USE - Ultrathin interface modified zinc metal negative electrode material is used in aqueous zinc-ion battery (claimed). ADVANTAGE - The electrode material is a uniform ultra-thin interface constructed on the zinc metal surface by the synthesis method of vertical lifting. The preparation technique is simple, environmentally-friendly and economical. The functionalized graphene protective layer has uniform zinc deposition shape and excellent conductivity, can reduce the polarization of the electrode and effectively inhibit the growth of zinc dendritic crystal, and effectively improves the electrochemical performance of the zinc ion battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of the negative electrode material, which involves adding functionalized graphene material to an alcohol solvent to prepare a slurry having a concentration of 1-5 mg/mL, removing oxide film on surface of to-be-deposited zinc-containing metal material, immersing the zinc-containing metal material vertically in a container of water, adding the slurry from side of the container opposite to to-be-deposited surface of the zinc-containing metal material, pulling the zinc-containing metal material vertically upward at a speed of 0.5-10 mm/second when the slurry is spread on the water surface and the slurry is spread to to-be-deposited surface of the zinc-containing metal material, depositing functionalized graphene protective layer on surface of the zinc-containing metal material, vertically immersing zinc-containing metal material deposited with the functionalized graphene protective layer in a container filled with water, repeating the pulling process and deposition process, and drying after reaching desired thickness; and (2) usage of the negative electrode material in aqueous zinc-ion battery.