▎ 摘　　要

NOVELTY - Graphene conductive agent with adjustable sheet diameter distribution ratio includes 0.1-20 wt.% graphene material, 0.2-18 wt.% dispersant, 0-12 wt.% other additives and 80-99.8 wt.% water. The graphene material includes two or three of the first graphene with a D50 of 0.1-3 micrometer, the second graphene with a D50 of 2-10 micrometer, and the third graphene with a D50 of 8-20 micrometer. USE - Graphene conductive agent with adjustable sheet diameter distribution ratio for negative electrode and for lithium ion battery (all claimed). ADVANTAGE - The graphene conductive agent with adjustable sheet diameter distribution ratio has graphenes of different sheet diameters that can provide dimension-oriented conduction in the three-dimensional conductive network, have a very low steric effect, and can effectively improve the rate performance of the battery, and bridging effect of different sheet diameters in the active material greatly reduces the resistivity of the pole sheet and effectively improves the specific capacity and rate performance of the lithium battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene conductive agent with adjustable sheet diameter distribution ratio, which involves: (A) adding dispersant and other additives to water, stirring uniformly, and obtaining an additive solution; (B) adding the first graphite-like carbon material to the auxiliary agent solution, stirring and dispersing under ultrasonic conditions, to obtain a first pre-dispersion liquid; and (C) grinding the first pre-dispersion liquid, performing homogeneous exfoliation under a pressure of 100-200 megapascal to obtain a graphene conductive agent containing the first graphene and the second graphene.