▎ 摘　　要

NOVELTY - A water-dispersible graphene nanosheet comprises a carbon layer basal plane, in which at least a portion of the carbon layer basal plane end is sulfated. USE - Water-dispersible graphene nanosheet used in water-dispersible graphene composition (claimed). ADVANTAGE - The water-dispersible graphene nanosheet is stably dispersed in water, has excellent dispersibility, mechanical, electrical, chemical and thermal properties, and provides the water-dispersible graphene composition having excellent dispersibility and dispersion stability without using the dispersing agent while using water as solvent. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for water-dispersible graphene composition, which comprises the water-dispersible graphene nanosheet and water and does not contain a dispersant.