▎ 摘　　要

NOVELTY - The method involves preparing MXene water solution, graphene oxide water solution and polystyrene nano ball dispersion liquid. The MXene aqueous solution is mixed, the graphene oxide aqueous solution and the polystyrene nano -sphere dispersion liquid, ultrasonically dispersing to obtain mixed solution, the mixed solution is covered on the surface of the film by vacuum filtering to obtain the composite film. The composite film is calcined under the inert atmosphere to obtain the graphene or MXene composite film. USE - Preparation method of graphene or MXene composite film used for electromagnetic shielding, coating, piezoresistive sensor, capacitor, and deionized water of purifying. ADVANTAGE - The method is simple, mild, easy to scale production, has multi-level mesoporous structure, reduces the aggregation of graphene and MXene, so as to have good capacitance performance, and graphene/MXene composite film has good bending flexibility. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a graphene/MXene composite film. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the graphene/MXene composite film of scanning electric mirror image.