▎ 摘　　要

NOVELTY - Graphene sponge having a three-dimensional porous structure, is claimed. USE - Graphene sponge. ADVANTAGE - The graphene sponge can be prepared in a simple and cost-effective manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the graphene sponge comprising exfoliation of graphene oxide to obtain a graphene oxide solution, uniformly mixing graphene oxide solution and n-hexane to obtain a mixed solution, freeze-drying the mixed solution to obtain an oxidized graphite alkene sponge, and carrying out annealing treatment of the obtained oxidized graphite alkene sponge under the protection of nitrogen.