▎ 摘　　要

NOVELTY - Preparing graphene-based composite slurry agent, involves (a) adding the dispersant into the tannic acid solution, and mixing uniformly to obtain the modified dispersant solution, (b) adding the graphene powder and hydrogen-inhibiting agent into the modified dispersant solution, stirring, centrifuging to obtain modified graphene-based solution, (c) preparing carbon nanotube slurry, (d) mixing the carbon nano-tube slurry with the modified graphene-based solution, stirring under the ultrasonic condition, washing, drying to obtain the graphite alkenyl-carbon nano-tube composite slurry, and (e) vibrating and separating the graphite alkenyl-carbon nano-tube composite slurry by screen to obtain target product. USE - Method for preparing graphene-based composite slurry agent. ADVANTAGE - The method uses hydrophilic and carbon nano-tube slurry of tannic acid to improve the dispersibility of graphene-based material, avoid the stacking and agglomeration, makes the fluctuation range of the prepared graphene- based composite slurry agent viscosity and fineness smaller, and provides better slurry uniformity.