Publication
Electrodeposition and characterization of nickel–copper metallic foams for application as electrodes for supercapacitors
| dc.contributor.author | Eugénio, S. | |
| dc.contributor.author | Silva, Maria Teresa Oliveira de Moura e | |
| dc.contributor.author | Carmezim, M. J. | |
| dc.contributor.author | Duarte, R. G. | |
| dc.contributor.author | Montemor, M. F. | |
| dc.date.accessioned | 2014-06-26T10:43:06Z | |
| dc.date.available | 2014-06-26T10:43:06Z | |
| dc.date.issued | 2014-04 | |
| dc.description.abstract | Nickel-copper metallic foams were electrodeposited from an acidic electrolyte, using hydrogen bubble evolution as a dynamic template. Their morphology and chemical composition was studied by scanning electron microscopy and related to the deposition parameters (applied current density and deposition time). For high currents densities (above 1 A cm(-2)) the nickel-copper deposits have a three-dimensional foam-like morphology with randomly distributed nearly-circular pores whose walls present an open dendritic structure. The nickel-copper foams are crystalline and composed of pure nickel and a copper-rich phase containing nickel in solid solution. The electrochemical behaviour of the material was studied by cyclic voltammetry and chronopotentiometry (charge-discharge curves) aiming at its application as a positive electrode for supercapacitors. Cyclic voltammograms showed that the Ni-Cu foams have a pseudocapacitive behaviour. The specific capacitance was calculated from charge-discharge data and the best value (105 F g(-1) at 1 mA cm(-2)) was obtained for nickel-copper foams deposited at 1.8 A cm(-2) for 180 s. Cycling stability of these foams was also assessed and they present a 90 % capacitance retention after 10,000 cycles at 10 mA cm(-2). | por |
| dc.description.sponsorship | Agências Financiadoras: Fundação para a Ciência e Tecnologia (FCT: PTDC/CTM-MET/119411/2010 COST Action: MP1004 MP1106 | por |
| dc.identifier.citation | EUGÉNIO, S,; SILVA, T. M.; CARMEZIM, M. J.; DUARTE, R. G.; MONTEMOR, M. F. - Electrodeposition and characterization of nickel–copper metallic foams for application as electrodes for supercapacitors. Journal of Applied Electrochemistry . ISSN 0021-891X. Vol. 44, nr. 4 (2014), p. 455-465. | por |
| dc.identifier.issn | 0021-891X | |
| dc.identifier.issn | 1572-8838 | |
| dc.identifier.other | 10.1007/s10800-013-0646-y | |
| dc.identifier.uri | http://hdl.handle.net/10400.21/3677 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Springer | por |
| dc.relation.publisherversion | http://link.springer.com/article/10.1007%2Fs10800-013-0646-y | por |
| dc.subject | Nickel-copper | por |
| dc.subject | Nanostructured foams | por |
| dc.subject | Electrodeposition | por |
| dc.subject | Electrodes for supercapacitors | por |
| dc.title | Electrodeposition and characterization of nickel–copper metallic foams for application as electrodes for supercapacitors | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Dordrecht | por |
| oaire.citation.endPage | 465 | por |
| oaire.citation.issue | 4 | por |
| oaire.citation.startPage | 455 | por |
| oaire.citation.title | Journal of Applied Electrochemistry | por |
| oaire.citation.volume | 44 | por |
| rcaap.rights | restrictedAccess | por |
| rcaap.type | article | por |