▎ 摘　　要

NOVELTY - A composite graphene slurry comprises graphene oxide slurry, and self-assembling additive in a weight ratio of (10-20):1. USE - Composite graphene slurry. ADVANTAGE - The composite graphene slurry has excellent self-assembling property, adopts binder, which is common industrial raw material, low in cost, high in affinity with graphene oxide, and convenient for large-scale production, and can be prepared by a method, which reduces production difficulty and cost of coating process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the composite graphene slurry, which involves: preparing graphene oxide with a solid content of 3-10% and a viscosity of 100000-1000000 cP by using Hummers method, cleaning, and dispersing in a planetary disperser for 1-4 hours to obtain a graphene oxide slurry; selecting a solute of self-assembling additive solution including epoxy resin, polyetherimide, hydroxypropyl methyl cellulose ether and polyethylenimine, and different combinations of solute and solvent; pouring the self-assembling additive solution into a beaker, adding a binder, stirring in a magnetic stirrer for 0.5-3 hours until the solute is completely dissolved in the solvent, stirring in a high speed disperser for 0.5-1 hour, and defoaming for 1-2 hours to obtain the self-assembling additive; adding the self-assembling additive to the graphene oxide slurry according to the mass ratio of (10-20):1, stirring for 2-4 hours, then dispersing, and defoaming for 1-2 hours to obtain an graphene oxide composite slurry; coating the graphene oxide composite slurry by adopting a manual coating or coating machine, and drying to obtain a graphene oxide thin film; and heating the graphene oxide thin film at 2800 degrees C, and heat-treating.