▎ 摘　　要

NOVELTY - The method for the preparation of highly dispersible graphene composite slurry involves mixing graphene oxide, hydroxymethyl cellulose and water and then subjecting the mixture to ultrasonic dispersion, mixing polyphenoxy resin, water-soluble polyamic acid, lignin and water and subjecting the mixture to ultrasonic dispersion, dripping the mixed solution to the graphene oxide dispersion solution, aging a mixed sol, performing supercritical fluid drying using carbon dioxide, and subjecting the graphene composite aerogel component to two-step radiation sintering in a microwave apparatus. USE - Method is useful for the preparation of highly dispersible graphene composite slurry (claimed). ADVANTAGE - The graphene composite slurry has high dispersibility and specific surface area, low internal resistance, improved physical and chemical stability and excellent aluminum foil adhesive force. DETAILED DESCRIPTION - The method for the preparation of highly dispersible graphene composite slurry involves mixing graphene oxide, hydroxymethyl cellulose and water in a mass ratio of 1:0.04-0.06:4-6 and then subjecting the mixture to ultrasonic dispersion to obtain a graphene oxide dispersion solution, where the graphene oxide is carboxylic acid group-, hydroxy group- or quaternary ammonium group-modified graphene oxide, mixing polyphenoxy resin, water-soluble polyamic acid, lignin and water in a mass ratio of 3-5:30-50:1:50-150 and then subjecting the mixture to ultrasonic dispersion to obtain a mixed solution, heating the graphene oxide dispersion solution at a temperature of 30-50 degrees C under stirring conditions, dripping the mixed solution to the graphene oxide dispersion solution for 20-40 minutes to obtain a mixed sol, where the mass ratio of mixed solution and graphene oxide dispersion solution is 8-12:1, aging the mixed sol at room temperature for 4-8 hours, removing the unreacted material with water, performing supercritical fluid drying using carbon dioxide as a drying medium at a pressure of 4-8 MPa and a temperature of 30-50 degrees C for 4-12 hours to obtain a graphene composite aerogel component, subjecting the graphene composite aerogel component to two-step radiation sintering in a microwave apparatus under the protection of inert gas to obtain a semi-carbonized product, where the first radiation sintering step is carried out at 250-350 degrees C for 0.5-2.5 hours and the second radiation sintering step is carried out at 450-550 degrees C for 1-3 hours, washing the semi-carbonized product, drying and pulverizing to obtain a graphene composite aerogel, adding 90-95 parts graphene composite aerogel, 2-3 parts conductive agent, 4-6 parts phenoxy resin to 200-400 parts organic solvent, uniformly dispersing, and crushing to obtain the highly dispersible graphene composite slurry.