▎ 摘　　要

NOVELTY - Graphene/zinc oxide core-shell structure composite material preparation method involves (i) dispersing graphene in N,N-dimethylformamide to obtain graphene dispersion, (ii) adding zinc nitrate solution and acetylacetone solution, stirring, dripping ammonia to adjust the pH value, centrifuging or filtering, washing, drying to obtain zinc acetylacetonate powder, (iii) adding zinc acetylacetonate powder to the graphene dispersion, stirring, (iv) transferring to a reaction kettle, carrying out hydrothermal reaction, centrifuging or filtering, washing and drying. USE - Graphene/zinc oxide core-shell structure composite material preparation method (claimed). ADVANTAGE - The deformation of the zinc anode and the growth of the zinc crystal grains are restrained, and the capacity and cycle life of zinc negative electrode are improved. The agglomeration effect between the graphene sheets is greatly weakened so that the characteristics of the graphene having a large specific surface area can be retained. DETAILED DESCRIPTION - Graphene/zinc oxide core-shell structure composite material preparation method involves (i) dispersing graphene in N,N-dimethylformamide to obtain graphene dispersion, (ii) preparing zinc nitrate solution and acetylacetone solution, then adding zinc nitrate solution and acetylacetone solution, stirring, dripping ammonia to adjust the pH value of the solution to 1-7, continuing the stirring reaction, then centrifuging or filtering, washing, drying to obtain zinc acetylacetonate powder, (iii) adding zinc acetylacetonate powder to the graphene dispersion, stirring so that the surface of graphene is coated with zinc acetylacetonate, (iv) transferring the solution system to a reaction kettle, carrying out hydrothermal reaction at 50-250 degrees C for 1-48 hours, centrifuging or filtering the product, washing and drying to obtain a graphene/zinc oxide core-shell structure composite material.