▎ 摘　　要

NOVELTY - Graphene composite conductive material comprises a conductive polymer monomer is 3,4-ethylenedioxythiophene, graphene, a dispersant, an initiator system and deionized water. The dispersant is sodium polystyrene sulfonate. Initiator system as the main initiator persulfate and auxiliary initiator trivalent iron salt composed of two-component initiator. The amount of 3,4-ethylenedioxythiophene, graphene, sodium polystyrene sulfonate, persulfate and auxiliary initiator trivalent iron salt and deionized water are 100 pts. wt., 40-60 pts. wt., 100-250 pts. wt., 6-10 pts. wt. and 8000-12000 pts. wt.. USE - Used as graphene composite conductive material. ADVANTAGE - The method achieves sufficient dispersion of graphene in the composite water-soluble conductive material, constructs a microstructure having a close interaction between poly 3,4-ethylenedioxythiophene and graphene by in situ polymerization method, so that the system by adding a small amount of graphene can significantly enhance the composite conductive ink electrical performance indicators, conductivity and Seebeck coefficient. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the material comprising (i) dissolving a certain amount of sodium polystyrene sulfonate salt in de-ionized water, to obtain sodium polystyrene sulfonate salt aqueous solution, adding a certain amount of graphene in polystyrene sulfonate salt aqueous solution, stirring uniformly after ultrasonically dispersing to obtain mixed liquid A, where graphene mass and 3,4-ethylene dioxythiophene mass ratio is 40-60:100, and deionized water and 3,4-ethylenedioxythiophene mass ratio is 100: 8000-11000; (ii) adding mixed liquid A with 3,4-ethylenedioxythiophene monomer added dropwise to the mixture A, completely stirred system are stable, to obtain a mixed system B; (iii) adding main initiator persulfate to the mixed system B in proportion, stir well until dissolved persulfate, to obtain the reaction system C, where persulfate and 3,4-ethylene dioxythiophene mass ratio is 220-270:100; (iv) auxiliary initiator trivalent iron salt solution was added dropwise to the reaction system C, ice bath reaction for 18-24 hours, to obtain a crude mixed solution D, where trivalent iron salt and 3,4-ethylenedioxythiophene mass ratio is 6-10:100; and (v) crude mixture D is exchanged through a cation exchange resin, and removing residual metal salt ions.