▎ 摘　　要

NOVELTY - Preparing graphene microchip by friction peeling using co-directional three-roll mill comprises e.g. (i) mixing graphite raw material and soluble inorganic salt in a mass ratio of 1:2-1:20, stirring to obtain graphite mixture, (ii) adding graphite mixture into three-roll mill, operating in three-roll mill, controlling three rollers of three-roll mill to rotate in the same direction, stripping graphite material passed through soluble inorganic salt, and (iii) removing soluble inorganic salts by washing to obtain large piece of graphene microchip. USE - The method is useful for preparing graphene microchip by friction peeling using co-directional three-roll mill (claimed). ADVANTAGE - The method is simple and is suitable for large-scale industrial production; and product is environmentally friendly. DETAILED DESCRIPTION - Preparing graphene microchip by friction peeling using co-directional three-roll mill comprises (i) mixing graphite raw material and soluble inorganic salt in a mass ratio of 1:2-1:20, stirring to obtain graphite mixture, (ii) adding graphite mixture into three-roll mill, operating in three-roll mill, controlling three rollers of three-roll mill to rotate in the same direction, where grinding points of each of the two rollers are in the opposite direction, during rotation, stripping graphite material passed through soluble inorganic salt, and (iii) removing soluble inorganic salts by washing to obtain large piece of graphene microchip.