▎ 摘　　要

NOVELTY - Flexible electrode material based on solid electrolyte graphene/MXene composite fiber comprises graphene and titanium carbide powder. The loading amount of MXene in the graphene/MXene doped material is 10-70 wt.%. The Ti3C2 adopts cationic modification treatment, and the surface zeta potential is positive. The graphene oxide surface contains oxygen-containing groups, and the Zeta potential is negative. USE - Flexible electrode material based on solid electrolyte graphene/MXene composite fiber used in portable, wearable electronic equipment and other fields. ADVANTAGE - The flexible electrode material based on solid electrolyte graphene/MXene composite fiber has simple process, low equipment requirements, and the prepared flexible woven supercapacitor has good biocompatibility, and also has excellent electrochemical performance and good flexibility and stretchability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for following: (1) a method for preparing a flexible electrode material based on solid electrolyte graphene/MXene composite fiber, which involves mixing 2-8g of concentrated sulfuric acid with 1-4g of concentrated nitric acid, then add 0.1-2g of graphite powder and 0.1-2g of potassium permanganate, and pumping the mixture with a circulating water multipurpose vacuum pump filter multiple times to a pH of 6-7, then putting the product after suction filtration into a vacuum drying oven at 40-80 degrees C to dry to powder;putting the crucible into the muffle furnace and heat it to 700-1000 degrees C, then taking it out with crucible tongs, quickly adding the dried powder to the crucible and cover the lid, and then cooling down at room temperature to obtain expanded graphite, where quality score is 98%;mixing concentrated sulfuric acid and sodium nitrate with a mass ratio of 0.1-1:10-60, stirring at 0-8 degrees C;adding expanded graphite, and then adding 2-10g potassium permanganate, stirrng vigorously for 0.1-2 hours;raising the temperature of the magnetic stirrer to 30-50 degrees C and stirring for 0.1-1.5 hours, and adding 50-150ml of distilled water dropwise during the reaction; (2) raising temperature of the magnetic stirrer to 70-100 degrees C (3) mixing solution with centrifugal speed of 9000-11000 rpm and carrying out centrifugal concentration and liquid crystal self-assembly to obtain a short-range orderly wet spinning solution;wet-spinning spinning solution using a micro syringe pump, and then solidifying the resulting spinning fiber in a coagulation bath to obtain graphene oxide/MXene composite fiber, and washing, drying, and reducing graphene oxide/MXene composite fiber in a hydroiodic acid/glacial acetic acid solution at a medium temperature; and (4) a method for preparing a flexible woven supercapacitor by using the graphene/MXene composite fiber flexible electrode material, which involves mixing 1-4g of polyvinyl alcohol with 5-36g of deionized water, putting it in a water bath at 80 100 degrees C and stirring, until the solution is transparent, adding 0.2ml~2ml phosphoric acid and stirring to obtain a gel-like electrolyte, applying the gel electrolyte to the surface of the graphene/MXene composite fiber and drying it at room temperature until the gel electrolyte is completely solidified to obtain a flexible woven electrode; and (5) gluing the two electrodes parallel to the PET film and stick a portion of it on the wire, and gluing another piece of PET film together to obtain a flexible woven supercapacitor based on solid electrolyte graphene/MXene composite fibers.