▎ 摘　　要

NOVELTY - Preparing polyvinylidene fluoride/graphene composite material comprises (i) uniformly dispersing at least one of graphene, graphene oxide and functional graphene into vinylidene fluoride monomer solution to obtain graphene/vinylidene fluoride monomer mixed solution; (ii) mixing the resulting mixed solution, deionized water, emulsifier and pH regulator in vacuum reaction chamber; (iii) introducing vinylidene fluoride gas monomer in vacuum reaction chamber, adding initiator to the mixed solution, and polymerizing the first preset time; (iv) adding initiator and molecular regulator in the mixed solution, polymerizing for second preset time under constant temperature and pressure, recycling residual vinylidene fluoride gas monomer in vacuum reaction chamber, and cooling to obtain polyvinylidene fluoride/graphene composite material emulsion; and (v) adding demulsifier into the emulsion, mixing to obtain composite material emulsion, filtering and vacuum drying. USE - The method is useful for preparing polyvinylidene fluoride/graphene composite material, which is useful in a conductive slurry. ADVANTAGE - The method can improve the mechanical property and electrical performance of the composite material and conductive slurry, and optimizes the performance of ion battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparation method of polyvinylidene fluoride/graphene conductive paste material; (2) a polyvinylidene fluoride/graphene conductive paste; and (3) an ion battery comprising a conductive agent. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of the preparation method of polyvinylidene fluoride/graphene composite material (Drawing includes non-English language text).