▎ 摘　　要

NOVELTY - The preparation method of graphene/metal composite conductive coating involves (i) adding atomized metal powder and graded steel balls into a ball mill jar, filling with anhydrous ethanol, wet grinding to obtain sheet metal powder, (ii) adding graphene oxide powder and dispersing agent to a ball mill jar in certain ratio, wet grinding, drying in a vacuum oven, and uniformly dispersing to obtain metal-modified graphene oxide powder, (iii) placing the metal-modified graphene oxide powder in a suspension furnace, and thermally reducing in suspension state. USE - Preparation of graphene/metal composite conductive coating (claimed). ADVANTAGE - The method enables the preparation of graphene/metal composite conductive coating capable of being adhered on the metal substrate with high strength. DETAILED DESCRIPTION - The preparation method of graphene/metal composite conductive coating involves (i) adding atomized metal powder and graded steel balls into a ball mill jar, filling with anhydrous ethanol, wet grinding at 200-400 rpm for a period of time (t1) to obtain sheet metal powder, (ii) adding graphene oxide powder and dispersing agent to a ball mill jar in certain ratio, wet grinding at 400-800 rpm for certain time (t2), drying in a vacuum oven at 80 degrees C, and uniformly dispersing to obtain metal-modified graphene oxide powder, (iii) placing the metal-modified graphene oxide powder in a suspension furnace, thermally reducing in suspension state at 400-1000 degrees C, introducing certain volume of argon shielding gas and hydrogen reducing gas into the suspension furnace at a certain flow rate, reacting for a period of time (t3), inline reducing graphene oxide attached to the flake metal powder to form graphene on the surface of the metal powder, cooling to room temperature to obtain metal-modified graphene composite powder, and (iv) thermally spraying metal-modified graphene composite powder on a metal substrate.