▎ 摘　　要

NOVELTY - A supercapacitor preparing method involves dispersing oxidized graphene in a dispersant, adding oxidized graphene oxide liquid with polypyrrole nanotubes, followed by subjecting mixture to ultrasonic treatment, filtering, dispersing oxidized graphene/polypyrrole nanotube composite thin film into reducing agent, filtering, coating graphene/polypyrrole nanotube composite film with electrolyte between two films and assembling to obtain the finished product. USE - Method for preparing a supercapacitor. ADVANTAGE - The method enables preparing the supercapacitor with better flexibility and better performance, in a simple manner. DETAILED DESCRIPTION - A supercapacitor preparing method involves dispersing oxidized graphene in a dispersant to obtain a certain concentration of graphene oxide liquid. The oxidized graphene oxide liquid is added with polypyrrole nanotubes, subjected to ultrasonic treatment and filtered to obtain an oxidized graphene/polypyrrole nanotube composite thin film. The oxidized graphene/polypyrrole nanotube composite thin film is dispersed into a reducing agent and filtered to obtain a graphene/polypyrrole nanotube composite film. The graphene/polypyrrole nanotube composite film are coated with electrolyte between the two films and assembled to obtain the finished product.