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Two-Dimensional CVD-Graphene/Polyaniline Supercapacitors: Synthesis Strategy and Electrochemical Operation
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SYSNO ASEP 0545001 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Two-Dimensional CVD-Graphene/Polyaniline Supercapacitors: Synthesis Strategy and Electrochemical Operation Author(s) Bláha, Michal (UFCH-W) RID, ORCID, SAI
Bouša, Milan (UFCH-W) RID, ORCID
Valeš, Václav (UFCH-W) RID, ORCID
Frank, Otakar (UFCH-W) RID, ORCID
Kalbáč, Martin (UFCH-W) RID, ORCIDSource Title ACS Applied Materials and Interfaces. - : American Chemical Society - ISSN 1944-8244
Roč. 13, č. 29 (2021), s. 34686-34695Number of pages 10 s. Language eng - English Country US - United States Keywords polyaniline-graphene nanocomposites ; high-performance supercapacitors ; walled carbon nanotubes ; conducting polymer ; interfacial polymerization ; raman-spectroscopy ; monolayer ; composite ; aniline ; electrodes ; two-dimensional heterostructure ; CVD-graphene ; polyaniline monolayer ; Raman spectroelectrochemistry ; supercapacitor Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GX20-08633X GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000679917500092 EID SCOPUS 85111601875 DOI 10.1021/acsami.1c05054 Annotation Nanocomposites of graphene materials and conducting polymers have been extensively studied as promising materials for electrodes of supercapacitors. Here, we present a graphene/polyaniline heterostructure consisting of a CVD-graphene and polyaniline monolayer and its electrochemical operation in a supercapacitor. The synthesis employs functionalization of graphene by p-phenylene sulfonic groups and oxidative polymerization of anilinium by ammonium persulfate under reaction conditions, providing no bulk polyaniline. Scanning electron microscopy, atomic force microscopy, and Raman spectroscopy showed the selective formation of polyaniline on the graphene. In situ Raman spectroelectrochemistry and cyclic voltammetry (both in a microdroplet setup) confirm the reversibility of polyaniline redox transitions and graphene electrochemical doping. After an increase within the initial 200 cycles due to the formation of benzoquinone-hydroquinone defects in polyaniline, the specific areal capacitance remained for 2400 cycles with +/- 1% retention at 21.2 mu F cm(-2), one order of magnitude higher than the capacitance of pristine graphene. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0321784
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