Three-dimensional design and fabrication of reduced graphene oxide/polyaniline composite hydrogel electrodes for high performance electrochemical supercapacitors

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dc.authorid0000-0003-0345-4924
dc.authorid0000-0002-1806-0330
dc.authorscopusid9735216100
dc.authorscopusid57190397371
dc.authorscopusid7006509807
dc.authorwosidEl-Kady, Maher/Q-1663-2019
dc.authorwosidKaner, Richard B./K-1594-2019
dc.authorwosidAtes, Murat/G-3798-2012
dc.contributor.authorAteş, Murat
dc.contributor.authorEl-Kady, Maher
dc.contributor.authorKaner, Richard B.
dc.date.accessioned2022-05-11T14:31:00Z
dc.date.available2022-05-11T14:31:00Z
dc.date.issued2018
dc.departmentFakülteler, Fen Edebiyat Fakültesi, Kimya Bölümü
dc.description.abstractGraphene/polyaniline composite hydrogels (GH/PANI) were chemically synthesized by in situ polymerization of aniline monomer. Graphene hydrogels were obtained by a hydrothermal method and used in supercapacitors. The graphene/polyaniline composite hydrogel exhibits better electrochemical performance than the pure individual components as determined by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopic measurements. A remarkable specific capacitance (C-sp) of 323.9 F g(-1) was measured using CV at a scan rate of 2 mV s(-1) at 25 degrees C. GCD measurements (311.3 F g(-1)) and electrochemical impedance analysis also support these results. The numbers were obtained at extremely high loading masses: 7.14 mg cm(-2) for GH and GH/PANI synthesized at 0 degrees C, and 8.93 mg cm(-2) for GH/PANI synthesized at 25 degrees C. The corresponding areal capacitances are 1.14, 1.75 and 2.78 F cm(-2) for GH, and GH/PANI composite hydrogels synthesized at 0 degrees C and 25 degrees C, respectively. These values in F cm(-2) are 3.80, 5.83 and 9.27 times higher than commercially available activated carbon supercapacitors (similar to 0.3 F cm(-2) for a two electrode system). Moreover, the GH/PANI composite synthesized at 25 degrees C exhibits excellent stability with 99% initial capacitance retention after 1000 charge/discharge cycles. GH/PANI composites synthesized at 0 degrees C and 25 degrees C therefore hold promise for use in supercapacitor device applications.
dc.description.sponsorshipTUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [2219]; Kaner Lab group at UCLA (USA); Nanotech Energy
dc.description.sponsorshipM Ates acknowledges financial support from the TUBITAK post-doctoral fellowship programme (2219) for work in the Kaner Lab group at UCLA (USA). M El-Kady and R B Kaner thank Nanotech Energy for financial support.
dc.identifier.doi10.1088/1361-6528/aaae44
dc.identifier.issn0957-4484
dc.identifier.issn1361-6528
dc.identifier.issue17en_US
dc.identifier.pmid29424710
dc.identifier.scopus2-s2.0-85043482197
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1088/1361-6528/aaae44
dc.identifier.urihttps://hdl.handle.net/20.500.11776/7274
dc.identifier.volume29
dc.identifier.wosWOS:000426587000002
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthorAteş, Murat
dc.language.isoen
dc.publisherIop Publishing Ltd
dc.relation.ispartofNanotechnology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectsupercapacitor
dc.subjectenergy density
dc.subjectthermal exfoliation
dc.subjectgraphene hydrogel
dc.subjectpolyaniline
dc.subjectConducting Polymers
dc.subjectCarbon Nanotube
dc.subjectPolyaniline
dc.subjectOxide
dc.subjectFilms
dc.subjectPolymerization
dc.subjectNanocomposite
dc.subjectConstruction
dc.subjectBehavior
dc.titleThree-dimensional design and fabrication of reduced graphene oxide/polyaniline composite hydrogel electrodes for high performance electrochemical supercapacitors
dc.typeArticle

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