Significance of surface roughness in the supercapacitor activity of nickel-based electrodes

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dc.authorid0000-0003-0670-5987
dc.authorscopusid15840195400
dc.authorwosidGDX-1262-2022
dc.contributor.authorKunduracı, Muharrem
dc.contributor.authorÇirmi, Doğan
dc.contributor.authorDoğan Çalhan, Selda
dc.contributor.authorÇağlayan, Uğur
dc.date.accessioned2023-08-18T12:00:47Z
dc.date.available2023-08-18T12:00:47Z
dc.date.issued2021
dc.departmentFakülteler, Havacılık ve Uzay Bilimleri Fakültesi, Havacılık ve Uzay Mühendisliği Bölümü
dc.description.abstractNickel-based thin film electrodes were electrodeposited onto copper substrate using a deep eutectic solvent. The supercapacitor performance of these electrodes in alkaline KOH solution was greatly enhanced by altering surface roughness of coatings. In order to create a rougher surface, two paths were followed. In the first path, Ni-only coatings were prepared at different deposition potentials and smooth-to-rough transition in surface morphology took place at higher potentials due to increasing emission of hydrogen bubbles. In the second path, Ni-Zn binary coatings with varying zinc concentration were electrodeposited and surface roughness was formed by dealloying zinc element from the electrodes as corroborated by Scanning Electron Microscopy and Atomic Force Microscopy results. In both paths, noticeable improvements in the capacitance of nickel electrodes were observed upon the apperance of rougher surface. A linear relationship was discovered between cathodic peak currents and polarization values in the cyclic voltammetry scans of electrodes, possibly for the first time here in literature. The increase in polarization was explained by the decrease in electrode conductivity proved by dwindling of metallic nickel peaks in X-ray diffraction upon electrochemical testing.
dc.identifier.citationKunduraci, M., Çirmi, D., Çalhan, S.D., (2021). Significance of surface roughness in the supercapacitor activity of nickel-based electrodes. Applied Physics A, 127, 618.https://doi.org/10.1007/s00339-021-04784-3
dc.identifier.doi10.1007/s00339-021-04784-3
dc.identifier.issn1432-0630
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-85111317240
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1007/s00339-021-04784-3
dc.identifier.urihttps://hdl.handle.net/20.500.13099/165
dc.identifier.volume127en_US
dc.identifier.wosWOS:000691442900002
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorKunduracı, Muharrem
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofApplied Physics A
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectSupercapacitor
dc.subjectDES
dc.subjectNickel
dc.subjectThin film
dc.subjectAtomic force microscopy
dc.subjectCyclic voltammetry
dc.subjectDealloying
dc.subjectElectrodeposition
dc.subjectMorphology
dc.subjectNickel metallography
dc.subjectPolarization
dc.subjectPotassium hydroxide
dc.subjectScanning electron microscopy
dc.subjectSupercapacitor
dc.subjectSurface morphology
dc.subjectSurface roughness
dc.subjectZinc coatings
dc.subjectZinc metallography
dc.subjectCopper substrates
dc.subjectDeep eutectic solvents
dc.subjectDeposition potential
dc.subjectElectrochemical testing
dc.subjectLinear relationships
dc.subjectNickel electrode
dc.subjectThin-film electrode
dc.subjectZinc concentration
dc.subjectElectrochemical electrodes
dc.titleSignificance of surface roughness in the supercapacitor activity of nickel-based electrodes
dc.typeArticle

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