Preparation of PEDOT∶PSS/Fe3O4 Composite Films and Their Supercapacitor Properties
A composite was fabricated by cost-effective Fe3O4 nanoparticles as fillers into a substrate composed of poly(3,4-vinyl dioxythiophene):poly(styrene sulfonic acid)(PEDOT:PSS).And the obtained composite was post-treated via HClO4 for harvesting flexible self-supporting PEDOT∶PSS/Fe3O4 films.The morphology and structure of PEDOT∶PSS/Fe3O4 films were characterized by scanning electron microscopy(SEM),X-ray diffractometer(XRD),X-ray photoelectron spectroscopy(XPS)and Raman spectroscopy(Raman),the electrochemical performance analysis was conducted using cyclic voltammetry(CV)and galvanostatic charge/discharge(GCD).The results demonstrate that the acid-treated PEDOT∶PSS/Fe3O4 composite film possesses a rough surface,and the electrochemical property is significantly improved,exhibiting superior rate capability.The specific capacitance of 106 F/g is achieved at a current density of 1 A/g,which is far beyond the original PEDOT∶PSS film and the untreated PEDOT∶PSS/Fe3O4 composite film.Furthermore,the specific capacitance remains at 81 F/g,even the current density is increased to 10 A/g.
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