▎ 摘　　要

NOVELTY - A flexible supercapacitor electrode comprises graphene paper and three-dimensional porous graphene composited with graphene paper. USE - Flexible supercapacitor electrode. ADVANTAGE - The flexible supercapacitor electrode has pore structure, large specific surface area, excellent mechanical property, and ion diffusion ability, charge storage ability and capacitance characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a flexible supercapacitor electrode preparing method, which involves mixing and stirring organic dispersed phase of surface-modified magnetic nanoparticles with water-dispersed phase of graphene oxide, carrying out reaction and centrifuging material to obtain magnetic nanoparticle-modified graphene oxide, dispersing obtained graphene oxide in ethanol solution to obtain magnetic nanoparticle modified graphene oxide dispersion, coating graphene oxide on surface of substrate, placing graphene oxide gel in the ethanol solution, applying magnetic field under graphene oxide gel, adding magnetic nanoparticle-modified graphene oxide dispersion to the ethanol solution were the magnetic nanoparticle-modified graphene oxide is enriched, aligned and assembled on the surface of the graphene oxide by a magnetic field to obtain flexible supercapacitor electrode precursor. The supercapacitor electrode is reduced using reducing agent and washed with deionized water to obtain product.