▎ 摘　　要

NOVELTY - Preparation of electro active biomass-based conductive composite film involves (1) mixing graphene oxide with hydrogen peroxide hydrothermally to obtain porous graphene oxide, (2) subjecting single-walled carbon nanotubes to condensation and reflux treatment with concentrated nitric acid to obtain acidified single-walled carbon nanotubes, (3) mixing lignosulfonate, acidified single-walled carbon nanotubes and porous graphene oxide to form uniformly dispersed solution, drying by suction filtration to obtain ternary composite film, and (4) heating the obtained composite film in lignosulfonate solution. USE - Preparation of electro active biomass-based conductive composite film used for super capacitor. ADVANTAGE - The method produces electro active biomass-based conductive composite film having layer network structure similar to that of single-walled carbon nanotubes and porous graphene oxide. The use of self-reinforcing cellulose hydrogel provides high-performance wearable supercapacitor having large area capacitance and high energy density, and excellent flexibility. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of self-reinforcing cellulose hydrogel, which involves (1) dissolving microcrystalline cellulose in sodium hydroxide-urea to obtain a microcrystalline cellulose solution, (2) adding small amount of bacterial cellulose to the crystalline cellulose solution and stirring to obtain a mixed solution, (3) adding small amount of mixed cellulose solution with dilute sulfuric acid; and (2) preparation of high-performance wearable super capacitor, which involves assembling the conductive composite film and the self-reinforcing cellulose hydrogel into sandwich-like form.