▎ 摘　　要

NOVELTY - Graphene dispersion liquid comprises 5-10 pts. wt. graphene, 0.5-1 pt. wt. dispersant and 89-95 pts. wt. solvent. The dispersant includes high molecular weight dispersant and low molecular weight dispersant. USE - The graphene dispersion liquid is useful in conductive agent, battery and electrothermal paste (claimed). ADVANTAGE - The graphene dispersion liquid: achieves high-efficiency peeling while reducing the amount of dispersant; contains low-molecular-weight and high-molecular-weight surfactants, which has synergistic effect and is conducive to the stable dispersion of graphene. The method: utilizes dispersant in batches, which avoids damage to the structure of polymer dispersant by multiple pre-dispersion treatments, and thus improves the controllability of process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene dispersion liquid, comprising (i) dispersing high molecular weight dispersant and low molecular weight dispersant in solvent, respectively to obtain mixed liquid A and mixed liquid B, (ii) stirring graphite, then adding into mixed liquid A, and performing pre-dispersion to obtain pre-dispersed liquid, and (iii) adding mixing liquid B into pre-dispersion liquid, and continue pre-dispersion to obtain final product.