▎ 摘　　要

NOVELTY - Porous ferroferric oxide film/multilayer graphene composite material is prepared by distributing ferroferric oxide in a film-like shape on the surface of the multilayer graphene, and the ferroferric oxide film has continuously distributed nanopores. The nanopores are obtained by preparing ferroferric oxide-silicon oxide film on a multilayer graphene sheet after removing the silicon oxide, and the multilayer graphene is obtained by mechanically peeling off expanded graphite. USE - Porous ferroferric oxide film/multilayer graphene composite material. ADVANTAGE - The porous ferroferric oxide film/multilayer graphene composite material has a wide range of application prospects in lithium ion batteries and supercapacitor anode materials and catalytic materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing porous ferroferric oxide film/multilayer graphene composite material, which involves: (A) measuring dimethylformamide and distilled water with a volume ratio of 8:2; (B) adding expanded graphite, and obtaining a multi-layer graphene solution by ultrasonic oscillation, where the concentration of the multi-layer graphene is 2 mg/ml; (C) adding anhydrous sodium acetate, ethyl orthosilicate and ferrous oxide tetrahydrate to the multilayer graphene solution, where the volume ratio of ethyl orthosilicate to mixed solvent is 0.001:1-0.005:1; (D) putting the mixed solution in a 90 degrees C aqueous solution and magnetically stirring for 2 hours; (E) taking out the product after cooling; (F) cleaning it by centrifugation with deionized water and then clean it with alcohol; (G) adding dd the cleaned product to a potassium hydroxide solution with a concentration of 8mol/l; (H) stirring in a water bath at 80 degrees C for 2 hours; (I) taking out the product after cooling; (J) cleaning with deionized water and then by alcohol; and (K) obtaining the porous ferroferric oxide film/multilayer graphene composite material.