▎ 摘　　要

NOVELTY - Preparation of graphene-based hollow fiber involves chemically oxidizing expanded graphite powder, ultrasonically dispersing obtained graphite oxide in deionized water, adding a reducing agent to obtained 5-20 mg/mL aqueous solution of graphene oxide, mixing, adding obtained precursor solution to an injection tubular mold, sealing the mold, molding at 50-100 degrees C for 2-6 hours, opening the mold and drying. USE - Preparation of graphene-based hollow fiber used as electrode in linear capacitor (claimed). ADVANTAGE - The method enables economical preparation of graphene-based hollow fiber with high charge storage capability, and excellent electroconductivity and flexibility, using nontoxic graphene oxide aqueous solution as a main raw material, by safe, simple and environmentally-friendly process. The linear capacitor containing the graphene-based hollow fiber as an electrode, has high capacitance and energy density.