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Electrodeposited MoOx films as negative electrode materials for redox supercapacitors

2017-01-20Journal article Restricted access
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dc.contributor.authorUpadhyay, Kush
dc.contributor.authorNguyen, Tuyen
dc.contributor.authorMoura E Silva, Teresa
dc.contributor.authorCarmezim, Maria
dc.contributor.authorMONTEMOR, FATIMA
dc.date.accessioned2017-03-28T08:27:57Z
dc.date.available2017-03-28T08:27:57Z
dc.date.issued2017-01-20
dc.description.abstractMoOx films composed of agglomerated nanoparticles were synthesized by potentiostatic electrodeposi-tion on stainless steel collectors for charge storage electrodes working in aqueous electrolyte (1 M H2SO4) and negative potential window. The agglomerated nanoparticles were amorphous in nature and possess mixed valance state. By optimizing the charge density applied during electrodeposition, the electrodes delivered maximum specific capacity of 228 C g_1 (507 F g_1) at 1 A g_1 for the sample electrodeposited at _0.3 C cm_2. This film showed very good rate capability and retained around 48% of specific capacity at 10 A g_1. The galvanostatic charge discharge cycling stability test showed 87% of initial capacity retained after 900 cycles, suggesting good stability behaviour. Electrochemical impedance spectroscopy (EIS) measurements evidenced lower equivalent series resistance for the sample electrodeposited at _0.3 C cm_2 among the tested samples, revealing its better electrochemical performance. Aging of the electrode with higher specific capacity was also investigated by performing EIS after different cycles; the results revealed an increment on the overall resistance, thus clarifying the capacity degradation.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationUPADHYAY, Kush K.; [et al] – Electrodeposited MoOx films as negative electrode materials for redox supercapacitors. Electrochimica Acta. ISSN 0013-4686. Vol. 225 (2017), pp. 19-28pt_PT
dc.identifier.doiDOI: 10.1016/j.electacta.2016.12.106pt_PT
dc.identifier.issn0013-4686
dc.identifier.urihttp://hdl.handle.net/10400.21/6888
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.researchgate.net/profile/Kush_Upadhyay/publication/311862793_Electrodeposited_MoOx_films_as_negative_electrode_materials_for_redox_supercapacitors/links/5861291608ae6eb871a85b2b.pdfpt_PT
dc.subjectMoOx supercapacitorpt_PT
dc.subjectElectrodepositionpt_PT
dc.subjectAmorphouspt_PT
dc.subjectNegativept_PT
dc.subjectElectrodept_PT
dc.titleElectrodeposited MoOx films as negative electrode materials for redox supercapacitorspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage28pt_PT
oaire.citation.startPage19pt_PT
oaire.citation.titleElectrochimica Actapt_PT
oaire.citation.volume225pt_PT
person.familyNameUpadhyay
person.familyNameNguyen
person.familyNameMoura e Silva
person.familyNameCarmezim
person.familyNameMONTEMOR
person.givenNameKush
person.givenNameTuyen
person.givenNameTeresa
person.givenNameMaria
person.givenNameFATIMA
person.identifier2555577
person.identifier572597
person.identifier.ciencia-idB61F-5699-0F1E
person.identifier.ciencia-id2D17-B93D-44BC
person.identifier.ciencia-id5B18-7F83-3065
person.identifier.ciencia-id3C16-79AA-7E94
person.identifier.orcid0000-0003-0120-6871
person.identifier.orcid0000-0002-7930-7763
person.identifier.orcid0000-0001-8402-6600
person.identifier.orcid0000-0002-0110-187X
person.identifier.orcid0000-0001-7835-6814
person.identifier.ridG-8065-2019
person.identifier.ridF-8778-2014
person.identifier.scopus-author-id56018964500
person.identifier.scopus-author-id6506601258
person.identifier.scopus-author-id6506753582
person.identifier.scopus-author-id7004347821
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication05ba1e6c-f4fd-43f7-9956-63bb128a2527
relation.isAuthorOfPublication657a2d07-274b-496f-a30f-a1ca2ca2568f
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relation.isAuthorOfPublication.latestForDiscovery657a2d07-274b-496f-a30f-a1ca2ca2568f

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