▎ 摘　　要

NOVELTY - Preparation of graphene-coated nano-porous tin composite material, involves preparing tin-based alloy powder, and then immersing the tin-based alloy powder in the graphene oxide aqueous solution for full reaction, and using the tin-based alloy to reduce the graphene oxide, wrapping the tin-based alloy with graphene to obtain a graphene-coated magnesium-tin alloy composite material, and dealloying the synthesized graphene-coated magnesium-tin alloy composite material in a corrosive solution. USE - Preparation of graphene-coated nano-porous tin composite material used in battery. ADVANTAGE - The composite material improves the conductivity of the tin electrode and effectively alleviates the volume expansion problem of the tin anode material, thereby improving the electrochemical performance of the battery.