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Electrochemical response of a high-power asymmetric supercapacitor based on tailored MnOx/Ni foam and carbon cloth in neutral and alkaline electrolytes

2019-04Journal article Restricted access
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dc.contributor.authorAldama, Ivan
dc.contributor.authorSiwek, K. I.
dc.contributor.authorAmarilla Alvarez, Jose Manuel
dc.contributor.authorRojo, Jose M.
dc.contributor.authorEugénio, Sónia
dc.contributor.authorMoura E Silva, Teresa
dc.contributor.authorMONTEMOR, MARIA
dc.date.accessioned2019-05-03T07:58:43Z
dc.date.available2019-05-03T07:58:43Z
dc.date.issued2019-04
dc.description.abstractTailored 3D Ni foams with smaller macropores and larger surface areas than commercial Ni foams are prepared by electrodeposition under the dynamic hydrogen bubble template on stainless steel substrates. These Ni foams are functionalized with electrodeposited manganese oxide (MnOx), resulting in MnOx/Ni foam composites. The electrochemical performance of the composites is studied in aqueous Na2SO4 and KOH electrolyte. Moreover, asymmetric cells, combining the MnOx/Ni foam composites as positive electrodes and carbon cloths as negative electrodes, are tested in the presence of the two electrolytes. Despite the significant number of papers dealing with asymmetric supercapacitors, there is still the need of understanding the electrolyte role for optimizing their electrochemical response. The cell potential window is broader in neutral electrolyte, 1.6 V, compared to the alkaline one, 1.2 V, but the cell capacitance is lower in the neutral electrolyte, 37 F g(-1), than in the alkaline one, 49 F g(-1). The energy density is similar for the two electrolytes, ca. 10 Wh kg(-1). The power density reaches 1-3.10(4) W kg(-1), which is among the highest values reported for asymmetric cells in aqueous electrolytes. The stability of the cells on cycling, floating and self-discharge are compared for the two electrolytes.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationALDAMA, I.; [et al] – Electrochemical response of a high-power asymmetric supercapacitor based on tailored MnOx/Ni foam and carbon cloth in neutral and alkaline electrolytes. Journal of Energy Storage. ISSN 2352-152X. Vol. 22 (2019), pp. 345-353pt_PT
dc.identifier.doi10.1016/j.est.2019.02.025pt_PT
dc.identifier.issn2352-152X
dc.identifier.urihttp://hdl.handle.net/10400.21/9922
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPEst-OE/QUI/UID/QUI/00100/2019 - FCTpt_PT
dc.relationM-ERA-NET/0004/2014 - FCTpt_PT
dc.relationSFRH/BD/123963/2016 - FCTpt_PT
dc.relationPCIN-2015-024 - Spanish MINECOpt_PT
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S2352152X18308570?token=CCAC26615940EB3DC7C6151DB590DB60FAB8FB864E5808C2151A74AC690D875A03FCDA1914431FBDF11E4162640FB5E5pt_PT
dc.subjectManganese oxidept_PT
dc.subjectFunctionalized Ni foampt_PT
dc.subjectNeutral electrolytept_PT
dc.subjectAlkaline or basic electrolytept_PT
dc.subjectAsymmetric supercapacitorpt_PT
dc.titleElectrochemical response of a high-power asymmetric supercapacitor based on tailored MnOx/Ni foam and carbon cloth in neutral and alkaline electrolytespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PEst-OE%2FQUI%2FUI0100%2F2013/PT
oaire.citation.endPage353pt_PT
oaire.citation.startPage345pt_PT
oaire.citation.titleJournal of Energy Storagept_PT
oaire.citation.volume22pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameAldama
person.familyNameAmarilla Alvarez
person.familyNameRojo
person.familyNameEugénio
person.familyNameMoura e Silva
person.familyNameMONTEMOR
person.givenNameIvan
person.givenNameJose Manuel
person.givenNameJose M.
person.givenNameSónia
person.givenNameTeresa
person.givenNameFATIMA
person.identifier572597
person.identifier.ciencia-idFA1A-5A76-E226
person.identifier.ciencia-id2D17-B93D-44BC
person.identifier.ciencia-id3C16-79AA-7E94
person.identifier.orcid0000-0002-6342-5044
person.identifier.orcid0000-0001-5974-6147
person.identifier.orcid0000-0003-3392-2856
person.identifier.orcid0000-0002-1386-5236
person.identifier.orcid0000-0001-8402-6600
person.identifier.orcid0000-0001-7835-6814
person.identifier.ridB-5472-2019
person.identifier.ridC-2769-2014
person.identifier.ridB-2254-2013
person.identifier.ridF-8778-2014
person.identifier.scopus-author-id42360965100
person.identifier.scopus-author-id6701804585
person.identifier.scopus-author-id35462448900
person.identifier.scopus-author-id12798023400
person.identifier.scopus-author-id6506601258
person.identifier.scopus-author-id7004347821
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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