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Two-Dimensional CVD-Graphene/Polyaniline Supercapacitors: Synthesis Strategy and Electrochemical Operation
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SYSNO ASEP 0545001 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Two-Dimensional CVD-Graphene/Polyaniline Supercapacitors: Synthesis Strategy and Electrochemical Operation Tvůrce(i) 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, ORCIDZdroj.dok. ACS Applied Materials and Interfaces. - : American Chemical Society - ISSN 1944-8244
Roč. 13, č. 29 (2021), s. 34686-34695Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova 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 Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP GX20-08633X GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000679917500092 EID SCOPUS 85111601875 DOI 10.1021/acsami.1c05054 Anotace 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. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2022 Elektronická adresa http://hdl.handle.net/11104/0321784
Počet záznamů: 1