▎ 摘　　要

NOVELTY - Preparing cellulose nanofiber film-based flexible electrode material comprises respectively preparing nitrogen-doped porous carbon fiber/graphene grafted polyaniline and cellulose nanofiber films, soaking cellulose nanofiber film in ethanol solution, adding nitrogen-doped porous carbon fiber/graphene grafted polyaniline, vacuum filtering to obtain nitrogen-doped porous carbon fiber/graphene grafted polyaniline/cellulose nanofiber membrane flexible electrode material, i.e., cellulose nanofiber membrane-based flexible electrode material. USE - The method is useful for preparing cellulose nanofiber film-based flexible electrode material comprising but are not limited to automobile, aerospace, military and electronic product. ADVANTAGE - The material: overcomes the disadvantage of low specific capacitance of a single carbon-based material; greatly improves the specific capacitance of the electrode material. The method: loads nitrogen-doped porous carbon fiber/graphene-grafted polyaniline onto a cellulose nanofiber film; and utilizes the flexibility of the substrate material cellulose nanofiber film to make the prepared electrode with excellent bendable properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a cellulose nanofiber film-based flexible electrode material prepared by the above-mentioned method.