Oligoether Ester-Functionalized ProDOT Copolymers on Si/Monolayer Graphene as Capacitive Thin Film Electrodes

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dc.authoridSarac, A.Sezai/0000-0001-7513-1740
dc.authoridSarac, Baran/0000-0002-0130-3914
dc.authoridEckert, Jurgen/0000-0003-4112-3181
dc.contributor.authorKarazehir, Tolga
dc.contributor.authorSarac, Baran
dc.contributor.authorGilsing, Hans-Detlev
dc.contributor.authorEckert, Juergen
dc.contributor.authorSarac, A. Sezai
dc.date.accessioned2025-01-06T17:45:04Z
dc.date.available2025-01-06T17:45:04Z
dc.date.issued2020
dc.description.abstractIn this study, electrochemical polymerization of 3,4-propylenedioxythiophene (ProDOT 1), ProDOT bearing oligoether ester (ProDOT-EO-ester 2) and their copolymerization onto homogeneously CVD coated nano-graphene/Si support is realized to attain graphene/ProDOT based copolymer hybrid nanostructures. By introducing oligoether side chain to ProDOT backbone and using different [ProDOT]/[ProDOT-EO-ester] molar ratios ensures a considerable decrease in oxidation potential of polymer allowing tunable properties to copolymers revealing improvement electrochemical capacitance and electrochemical activity which are clearly reflected by the experimental results. Capacitive behavior of copolymers is determined by electrochemical impedance spectroscopy, cyclic voltammetry. Moreover, The structural, morphological and spectroscopic characterization of the copolymers is investigated by XRD, AFM, SEM, EDX, FTIR, and Raman, respectively. By the increase of ProDOT in the copolymer composition, the higher dopant concentration is attained suggesting an enhanced conductivity agree well with the impedance and CV results, where the copolymerization of ProDOT 1 and ProDOT-EO-ester 2 in equal molarity results in the highest specific capacitance and redox activity. The adopted equivalent circuit model for polymers is in good agreement with the experimental data of impedance. Due to the difference in conjugated structure between ProDOT and ProDOT-EO-ester by the presence of the EO-ester group leads to a decrease in charge transfer resistance with increasing mole fraction of ProDOT-EO-ester. The charge transfer resistance of [ProDOT](0)/[ProDOT-EO-ester](0) = 1:1 coated Si/graphene is nearly 51 and 24 times lower value compared to those of PProDOT and P(ProDOT-EO-ester) homopolymers coated Si/graphene, respectively, confirming that the copolymerization improves the electron conduction. By Mott-Schottky measurements, increasing mole fraction of ProDOT-EO-ester 2 in copolymer composition results in the alteration of semiconducting behavior. The developed graphene-polymer hybrid electrodes can be a potential candidate for energy storage devices. (C) 2020 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
dc.description.sponsorshipSTSM via the COST Action (MULTICOMP) [CA15107]; European Research Council under the Advanced Grant INTELHYB-Next generation of complex metallic materials in intelligent hybrid structures [ERC-2013-ADG-340025]
dc.description.sponsorshipSupport of the STSM via the COST Action CA15107(MULTICOMP) for the short-term scientific mission at Erich Schmid Institute of Materials Science (oAW) to one of the authors (A.S.Sarac) is gratefully acknowledged. This work was supported by the European Research Council under the Advanced Grant INTELHYB-Next generation of complex metallic materials in intelligent hybrid structures (grant ERC-2013-ADG-340025). Fruitful discussions have been made with and technical help has been provided by M. Aydin.
dc.identifier.doi10.1149/1945-7111/ab7f85
dc.identifier.issn0013-4651
dc.identifier.issn1945-7111
dc.identifier.issue7
dc.identifier.scopus2-s2.0-85084930792
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1149/1945-7111/ab7f85
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3271
dc.identifier.volume167
dc.identifier.wosWOS:000521563700002
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElectrochemical Soc Inc
dc.relation.ispartofJournal of The Electrochemical Society
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectHıgh-Performance
dc.subjectCarbon-Fıber
dc.subjectElectrochemıcal Characterızatıon
dc.subjectSupercapacıtor Electrodes
dc.subjectComposıte-Materıals
dc.subjectNanorod Arrays
dc.subjectDouble-Layer
dc.subjectElectropolymerızatıon
dc.subjectImpedance
dc.subjectPolyanılıne
dc.titleOligoether Ester-Functionalized ProDOT Copolymers on Si/Monolayer Graphene as Capacitive Thin Film Electrodes
dc.typeArticle

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