▎ 摘　　要

NOVELTY - The flexible super-capacitor based on carbon-based composite electrode comprises a carbon fiber/conductive graphite/graphene/manganese oxide composite electrode (1), a polyvinyl acetate gel solid electrolyte (2) and a polydimethylsiloxane flexible package (3). The two sides of the polyvinylene acetate solid electrolytte are coated by the composite electrode to form a sandwich structure to perform polypropylene-dimethylsilyl sulfonate (PDMS) flexible package, and the lead-out electrode is used as a charging and discharging port in the packaging process. USE - The flexible super-capacitor based on carbon-based composite electrode is useful to supply power to the wearable smart wristband in the form of a portable wristband, and in consumer electronic market and uninterruptible power supply field such as fast storage energy in braking process in traffic field. The electrode is useful in the energy storage components of wearable, miniaturized and portable electronic equipment. ADVANTAGE - The flexible super-capacitor based on carbon-based composite electrode has a synergistic effect, high power density and long cycle life. By combining the high specific surface area of the porous structure electrode and the pseudocapacitance effect of the metal oxide attached to the electrode surface, the preparation of a flexible supercapacitor with high capacitance and stable operation is realized. The electrode is prepared using: polyvinyl alcohol gel with good biocompatibility as the solid electrolyte, phosphoric acid as the cross-linking initiator, and glutaraldehyde as the cross-linking agent, which can quickly obtain high ionic conductivity, wide potential window and wide operating temperature; and flexible carbon fiber as the current collector which combines with the silicone flexible packaging, so that the flexible supercapacitor has good biocompatibility, airtightness and good flexible bending performance, and improves the working reliability of the supercapacitor. The PDMS can isolate supercapacitors from the external environment and maintain excellent bending performance. At the same time, it is harmless to human skin. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing the flexible supercapacitor based on a carbon-based composite electrode. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the flexible super-capacitor based on carbon-based composite electrode. Carbon fiber/conductive graphite/graphene/manganese oxide composite electrode (1) Polyvinyl acetate gel solid electrolyte (2) Polydimethylsiloxane flexible package (3)