Electrochemical characteristics and microstructures of activated carbon powder supercapacitors for energy storage

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dc.contributor.authorGONSALVES, TAYARA C.
dc.contributor.authorSILVA, FRANKS M.
dc.contributor.authorVIEIRA, LIGIA S.
dc.contributor.authorCASINI, JULIO C.S.
dc.contributor.authorFARIA, RUBENS N. de
dc.coverageInternacionalpt_BR
dc.date.accessioned2018-12-04T16:32:06Z
dc.date.available2018-12-04T16:32:06Z
dc.date.issued2018pt_BR
dc.description.abstractIn recent years, extensive investigations have focused on the study and improvement of supercapacitor electrode materials. The electric devices produced with these materials are used to store energy over time periods ranging from seconds to several days. The main factor that determines the energy storage period of a supercapacitor is its self-discharge rate, i.e., the gradual decrease in electric potential that occurs when the supercapacitor terminals are not connected to either a charging circuit or electric load. Self-discharge is attenuated at lower temperatures, resulting in an increased energy storage period. This paper addresses the temperature-dependence of self-discharge via a systematic study of supercapacitors with nominal capacitances of 1.0 and 10.0 F at DC potentials of 5.5 and 2.7 V, respectively. The specific capacitances, internal resistances, and self-discharge characteristics of commercial activated carbon electrode supercapacitors were investigated. Using cyclic voltammetry, the specific capacitances were determined to be 44.4 and 66.7 Fg−1 for distinct carbon electrode supercapacitors. The self-discharge characteristics were investigated at both room temperature and close to the freezing point. The internal resistances of the supercapacitors were calculated using the discharge curves at room temperature. The microstructures of the electrode materials were determined using scanning electron microscopy.pt_BR
dc.format.extent597-602pt_BR
dc.identifier.citationGONSALVES, TAYARA C.; SILVA, FRANKS M.; VIEIRA, LIGIA S.; CASINI, JULIO C.S.; FARIA, RUBENS N. de. Electrochemical characteristics and microstructures of activated carbon powder supercapacitors for energy storage. <b>Materials Science Forum</b>, v. 930, p. 597-602, 2018. DOI: <a href="https://dx.doi.org/10.4028/www.scientific.net/MSF.930.597">10.4028/www.scientific.net/MSF.930.597</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/29309.
dc.identifier.doi10.4028/www.scientific.net/MSF.930.597pt_BR
dc.identifier.issn0255-5476pt_BR
dc.identifier.orcidaguardandopt_BR
dc.identifier.percentilfiSem Percentil
dc.identifier.percentilfiCiteScore15.50
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29309
dc.identifier.vol930pt_BR
dc.relation.ispartofMaterials Science Forumpt_BR
dc.rightsopenAccesspt_BR
dc.subjectactivated carbon
dc.subjectcapacitance
dc.subjectcapacitors
dc.subjectelectric discharges
dc.subjectelectrodes
dc.subjectenergy storage
dc.subjectmicrostructure
dc.subjectpowders
dc.subjectscanning electron microscopy
dc.subjectvoltametry
dc.subjectx-ray sources
dc.titleElectrochemical characteristics and microstructures of activated carbon powder supercapacitors for energy storagept_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorRUBENS NUNES DE FARIA JUNIOR
ipen.autorTAYARA CORREIA GONSALVES
ipen.codigoautor227
ipen.codigoautor14088
ipen.contributor.ipenauthorRUBENS NUNES DE FARIA JUNIOR
ipen.contributor.ipenauthorTAYARA CORREIA GONSALVES
ipen.date.recebimento18-12pt_BR
ipen.identifier.fiSem F.I.pt_BR
ipen.identifier.fiCiteScore0.5
ipen.identifier.ipendoc25098pt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication20cb7788-3957-4550-9e5c-cf7f5261eec4
relation.isAuthorOfPublicationecdc39ff-4666-4fae-8ea1-1edf5cadf303
relation.isAuthorOfPublication.latestForDiscoveryecdc39ff-4666-4fae-8ea1-1edf5cadf303
sigepi.autor.atividadeGONSALVES, TAYARA C.:14088:-1:Spt_BR
sigepi.autor.atividadeFARIA, RUBENS N. DE:227:730:Npt_BR
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