▎ 摘　　要

NOVELTY - Graphene is claimed. The graphene is formulated into a graphene aqueous dispersion with content of 0.01-1 wt.% and allowing to stand for 1 hour, and measuring the upper and middle parts of the same volume at the same temperature, respectively, where the absorbance of the bottom graphene aqueous dispersion, the relative deviations of the absorbance of the upper, middle and bottom graphene aqueous dispersions are not greater than 10%, preferably less than or equal to 5%, after allowing to stand for 12 hours, the relative deviations of the absorbance of upper, middle and bottom graphene aqueous dispersions are not greater than 20%, preferably less than or equal to 10%. USE - Used as graphene. ADVANTAGE - The graphene: has excellent dispersibility in water, solves the problem of inherent hydrophobicity of carbon materials and poor compatibility with other materials to a certain extent. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing graphene comprising (i) contacting graphite with an intercalating agent in the presence of ammonia or an ammonium salt to obtain graphite intercalation compound, (ii) contacting the obtained graphite intercalation compound with oxidizing agent to oxidize the intercalation agent of the graphite intercalation compound while achieving interlayer peeling of the graphite intercalation compound, and (iii) recovering the obtained product to obtain final product; and (2) graphene prepared by above method.