▎ 摘　　要

NOVELTY - Preparation of cellulose nanofiber electrochromic supercapacitor involves immersing carbon nanofiber/divalent copper ion-graphene oxide composite film in polyaniline dispersion liquid, drying, immersing in poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate solution, obtaining carbon nanofiber/divalent copper ion-graphene oxide-polyaniline-poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate composite membrane, and assembling double-electrode system of supercapacitor using obtained composite conductive film as electrode, and hydrofluoric acid-polyvinyl alcohol gel. USE - Preparation of cellulose nanofiber electrochromic supercapacitor (claimed). ADVANTAGE - The method enables preparation of readily biodegradable cellulose nanofiber electrochromic supercapacitor having high processing temperature and low thermal expansion coefficient. DETAILED DESCRIPTION - Preparation of cellulose nanofiber electrochromic supercapacitor involves immersing carbon nanofiber/divalent copper ion-graphene oxide (CNFs/(Cu2+GO)n, where n is not defined) composite film in polyaniline (PANI) dispersion liquid, taking out the resultant product, cleaning, drying, immersing in poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS) solution, taking out resultant product, cleaning, drying, obtaining carbon nanofiber/divalent copper ion-graphene oxide-polyaniline-poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (CNFs/(Cu2+GO)n/(PANI-PEDOT:PSS)m, where m is not defined) composite membrane, processing resultant composite membrane using dilute hydrochloric acid, reducing using hydroiodic acid, obtaining carbon nanofiber/reduced graphene oxide-polyaniline-poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (CNFs/(RGO)n/(PANI-PEDOT:PSS)m) composite conductive film, and assembling double-electrode system of supercapacitor (S-RGPP) using obtained composite conductive film as electrode, and hydrofluoric acid-polyvinyl alcohol gel as electrolyte.