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A Ternary PEDOT-TiO2-Reduced Graphene Oxide Nanocomposite for Supercapacitor Applications
Deniz Gulercan,Daniel Commandeur,Qiao Chen,A. Sezai Sarac 한국고분자학회 2019 Macromolecular Research Vol.27 No.9
A ternary composite of poly(3,4-ethylene dioxythiophene) (PEDOT) was prepared using TiO2 through an emulsion polymerization method adjusting various weight ratios of TiO2 to PEDOT, and blending synthesized reduced graphene oxide (rGO) with this composite. The Fourier transform infrared spectrophotometry, ultravioletvisible spectrophotometry, and X-ray diffraction analysis displayed characteristic features of PEDOT and TiO2. The morphology of the nano-hybrid structure was additionally investigated by scanning electron microscopy analysis. Pore size and surface area analysis of particles were characterized by the Brunauer-Emmett-Teller method. The electrochemical analysis showed that the specific capacitance (C sp) for PEDOT-TiO2-15-rGO was 18.9 F g-1 at 0.1 mA cm-2 current density.
Deniz Gülercan,İlknur Gergin,A. Sezai Sarac 한국섬유공학회 2018 Fibers and polymers Vol.19 No.10
In this work, conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) was synthesized on the surface of graphene oxide (GO) and reduced graphene oxide (rGO) sheets via in-situ microemulsion polymerization process to achieve graphene oxide-poly(3,4-ethylenedioxythiophene) (GO-PEDOT) and reduced graphene oxide-poly(3,4-ethylenedioxythiophene) (rGO-PEDOT) nanocomposites. Nanofibers of PEDOT, GO-PEDOT, rGO-PEDOT and GO on poly(acrylonitrile-costyrene) (P(AN-co-St)) matrice have also been fabricated due to their high potential in using as electrodes for flexible supercapacitors. As demonstrated by scanning electron microscope, atomic force microscope and spectroscopic techniques, PEDOT has been succesfully synthesized on the surface of the GO and rGO sheets. The SEM results demonstrate that nanofibers have beadless structure with a diameter range less than 300 nm. The electrochemical capacitive properties of the nanofibers were investigated by using electrochemical impedance spectroscopy. The electrochemical measurements reveal that GO enhances capacitive behavior of PEDOT nanofibers more than rGO, but both GO and rGO improve the electrochemical performance of the nanofibers.