▎ 摘　　要

NOVELTY - Preparing nitrogen-doped hollow carbon sphere modified graphene composite fiber, comprises uniformly dispersing nitrogen-treated hollow carbon ball in water to obtain dispersion liquid, adding dispersion liquid to non-liquid crystal graphene oxide solution, ultrasonically processing to prepare spinning solution, and injecting the spinning solution into coagulation bath for spinning to obtain composite fiber material. USE - The fiber material is useful in electrical field, and preparation of supercapacitors, flexible electrodes or wearable electronic devices (claimed). ADVANTAGE - The fiber material is good for preventing the stack of graphene sheet layer through the introduction of nitrogen-doped hollow carbon ball, and has excellent composite fiber electrochemical performance through the transmission of electrolyte ion and introducing pseudo-capacitor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for wearable electronic device.