▎ 摘　　要

NOVELTY - Preparation of composite membrane electrode involves mixing graphene oxide and a porous graphitized carbon, dispersing, obtaining a dispersion liquid, subjecting to vacuum-suction filtration, drying, obtaining graphene/porous graphitized carbon composite film and reducing resultant film. USE - Preparation of composite membrane electrode used in e.g. lithium-ion battery and super capacitor (all claimed). ADVANTAGE - The method enables preparation of composite membrane electrode having excellent dispersibility and electroconductivity. The capacitor provided using the composite membrane electrode has improved performance.