▎ 摘　　要

NOVELTY - A preparation method of graphene grafted polymer electrode material, involves preparing nitrogen-doped graphene oxide, activating nitrogen-doped graphene oxide with mixed solution of sulfuric acid and nitric acid to obtain activated nitrogen-doped graphene oxide, refluxing and reacting activated nitrogen-doped graphene oxide and toluene-2,4-diisocyanate to obtain diisocyanate-modified nitrogen-doped graphene oxide, mixing with aniline and p-phenylenediamine, copolymerizing under ammonium persulfate initiation to obtain nitrogen-doped graphene oxide grafted polyaniline-co-p-phenylenediamine, dissolving hexadecyltrimethylammonium bromide, ethanol and manganese nitrate in deionized water, adding the nitrogen-doped graphene oxide grafted polyaniline-co-p-phenylenediamine, and stirring to obtain dispersion liquid, dripping the potassium permanganate aqueous solution into the dispersion liquid, and reacting to obtain a final product. USE - Preparation method of graphene grafted polymer electrode material for preparing nitrogen-doped graphene oxide grafted polyaniline-co-p-phenylenediamine/manganese dioxide electrode used in supercapacitor (all claimed). Can also be used in lithium ion battery, solar battery electrode material, hydrogen storage material, sensor, optical material and medicine carrier. ADVANTAGE - The preparation method has the characteristics of stable process, easy operation, reliable quality and light weight, and is economical and environmentally-friendly. DETAILED DESCRIPTION - A preparation method of graphene grafted polymer electrode material, involves preparing nitrogen-doped graphene oxide, activating nitrogen-doped graphene oxide with mixed solution of sulfuric acid and nitric acid to obtain activated nitrogen-doped graphene oxide, refluxing and reacting activated nitrogen-doped graphene oxide and toluene-2,4-diisocyanate at 55-60degreesC to obtain diisocyanate-modified nitrogen-doped graphene oxide, mixing with aniline and p-phenylenediamine uniformly, copolymerizing under the initiation of ammonium persulfate to obtain nitrogen-doped graphene oxide grafted polyaniline-co-p-phenylenediamine, dissolving hexadecyltrimethylammonium bromide, ethanol and manganese nitrate in deionized water, adding the nitrogen-doped graphene oxide grafted polyaniline-co-p-phenylenediamine, and stirring to obtain dispersion liquid, dripping the potassium permanganate aqueous solution into the dispersion liquid, and reacting at room temperature to obtain nitrogen-doped graphene oxide grafted polyaniline-co-p-phenylenediamine/manganese dioxide as a final product. INDEPENDENT CLAIMS are included for the following: 1.a graphene grafted polymer electrode material; 2.a preparation method of electrode, which involves dispersing graphene grafted polymer electrode material, acetylene black and PTFE in absolute ethyl alcohol according to mass ratio of 8:1:1, coating fluorine on a surface of foamed nickel, vacuum drying, tableting under pressure of 10 MPa to obtain nitrogen-doped graphene oxide grafted polyaniline-co-p-phenylenediamine/manganese dioxide electrode; and 3.use of the electrode in supercapacitor.