PEDOT: PSS cross-linked carbonized cotton short fiber film and preparation method thereof

The invention discloses a preparation method of a PEDOT: PSS (poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate)) cross-linked carbonized cotton short fiber film, which comprises the following steps: (1) carrying out high-temperature carbonization on cotton in an argon atmosphere to obtain hollow tubular carbonized cotton fiber; (2) mechanically crushing the carbonized cotton prepared in the step (1), and drying to obtain hollow tubular carbonized cotton short fibers with the length of 50-120 microns; and (3) mixing the carbonized cotton short fiber obtained in the step (2) with an aqueous solution of PEDOT: PSS, carrying out ultrasonic treatment, and then carrying out vacuum filtration to obtain the PEDOT: PSS cross-linked carbonized cotton short fiber film. The invention also discloses a PEDOT: PSS cross-linked carbonized cotton short fiber film and a supercapacitor. According to the preparation method disclosed by the invention, the preparation process steps are simple, an adhesive does not need t