▎ 摘　　要

NOVELTY - Method for producing graphene-based separator involves heat-treating graphene oxide to form a nanoporous graphene having multiple nanopores, oxidizing the nanoporous graphene with an oxidizing agent, forming a functionalized nanoporous graphene combined with an oxygen functional group, and forming a separator by stacking the functionalized nanoporous graphene. USE - The method is useful for producing graphene-based separator. ADVANTAGE - The method enables production of graphene-based separator having excellent physical strength.