Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/handle/123456789/32078 |
Resumo: | In this study, composite powders synthesized by a novel one-step sol–gel method were used to obtain Ni–CGO anodes, while anodes of the same composition prepared from commercial powders were used as reference. The anodes performance was studied by impedance spectroscopy and dc polarization in the temperature range of 650–750 °C in flowing humidified 10% H2+90% N2 gas mixtures, using a three-electrode configuration cell, with clear advantage for the novel one-step route. One-step anodes fired at 1450 °C showed an area specific resistance of 0.15 Ω cm2 under open circuit conditions and an anodic overpotential of 91 mV at 750 °C for a current density of 322 mA/cm2, which are amongst the best results mentioned in the literature. The enhanced electrochemical performance of one-step anodes is mainly attributed to unique microstructural features, namely small grain size (submicrometer scale even after firing at 1450 °C) and homogeneous phase distribution, which is expected to extend the triple-phase boundary length |
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Macedo, Daniel Araújo deFigueiredo, Filipe Miguel Henriques Lebre RamosPaskocimas, Carlos AlbertoMartinelli, Antonio EduardoNascimento, Rubens Maribondo doMarques, Fernando M.B.2021-04-07T15:14:45Z2021-04-07T15:14:45Z2014-09MACEDO, Daniel A.; FIGUEIREDO, Filipe M.L.; PASKOCIMAS, Carlos A.; MARTINELLI, Antonio E.; NASCIMENTO, Rubens M.; MARQUES, Fernando M.B.. Ni–CGO cermet anodes from nanocomposite powders: microstructural and electrochemical assessment. Ceramics International, [S.L.], v. 40, n. 8, p. 13105-13113, set. 2014. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884214007330?via%3Dihub. Acesso em: 11 fev. 2021. http://dx.doi.org/10.1016/j.ceramint.2014.05.0100272-8842https://repositorio.ufrn.br/handle/123456789/3207810.1016/j.ceramint.2014.05.010ElsevierCompositesCElectrical propertiesFuel cellsNi–CGO anodesNi–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessmentinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleIn this study, composite powders synthesized by a novel one-step sol–gel method were used to obtain Ni–CGO anodes, while anodes of the same composition prepared from commercial powders were used as reference. The anodes performance was studied by impedance spectroscopy and dc polarization in the temperature range of 650–750 °C in flowing humidified 10% H2+90% N2 gas mixtures, using a three-electrode configuration cell, with clear advantage for the novel one-step route. One-step anodes fired at 1450 °C showed an area specific resistance of 0.15 Ω cm2 under open circuit conditions and an anodic overpotential of 91 mV at 750 °C for a current density of 322 mA/cm2, which are amongst the best results mentioned in the literature. The enhanced electrochemical performance of one-step anodes is mainly attributed to unique microstructural features, namely small grain size (submicrometer scale even after firing at 1450 °C) and homogeneous phase distribution, which is expected to extend the triple-phase boundary lengthengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/32078/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/32078/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTNi–CGOCermetAnodes_PASKOCIMAS_2014.pdf.txtNi–CGOCermetAnodes_PASKOCIMAS_2014.pdf.txtExtracted texttext/plain35754https://repositorio.ufrn.br/bitstream/123456789/32078/4/Ni%e2%80%93CGOCermetAnodes_PASKOCIMAS_2014.pdf.txt97a42e1fa4c8f6290fdc3968f30cf56eMD54THUMBNAILNi–CGOCermetAnodes_PASKOCIMAS_2014.pdf.jpgNi–CGOCermetAnodes_PASKOCIMAS_2014.pdf.jpgGenerated Thumbnailimage/jpeg1398https://repositorio.ufrn.br/bitstream/123456789/32078/5/Ni%e2%80%93CGOCermetAnodes_PASKOCIMAS_2014.pdf.jpg8e45c53c386298787e634d4f64918e00MD55123456789/320782023-01-30 19:17:41.173oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2023-01-30T22:17:41Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment |
title |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment |
spellingShingle |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment Macedo, Daniel Araújo de CompositesC Electrical properties Fuel cells Ni–CGO anodes |
title_short |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment |
title_full |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment |
title_fullStr |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment |
title_full_unstemmed |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment |
title_sort |
Ni–CGO cermet anodes from nanocomposite powders: Microstructural and electrochemical assessment |
author |
Macedo, Daniel Araújo de |
author_facet |
Macedo, Daniel Araújo de Figueiredo, Filipe Miguel Henriques Lebre Ramos Paskocimas, Carlos Alberto Martinelli, Antonio Eduardo Nascimento, Rubens Maribondo do Marques, Fernando M.B. |
author_role |
author |
author2 |
Figueiredo, Filipe Miguel Henriques Lebre Ramos Paskocimas, Carlos Alberto Martinelli, Antonio Eduardo Nascimento, Rubens Maribondo do Marques, Fernando M.B. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Macedo, Daniel Araújo de Figueiredo, Filipe Miguel Henriques Lebre Ramos Paskocimas, Carlos Alberto Martinelli, Antonio Eduardo Nascimento, Rubens Maribondo do Marques, Fernando M.B. |
dc.subject.por.fl_str_mv |
CompositesC Electrical properties Fuel cells Ni–CGO anodes |
topic |
CompositesC Electrical properties Fuel cells Ni–CGO anodes |
description |
In this study, composite powders synthesized by a novel one-step sol–gel method were used to obtain Ni–CGO anodes, while anodes of the same composition prepared from commercial powders were used as reference. The anodes performance was studied by impedance spectroscopy and dc polarization in the temperature range of 650–750 °C in flowing humidified 10% H2+90% N2 gas mixtures, using a three-electrode configuration cell, with clear advantage for the novel one-step route. One-step anodes fired at 1450 °C showed an area specific resistance of 0.15 Ω cm2 under open circuit conditions and an anodic overpotential of 91 mV at 750 °C for a current density of 322 mA/cm2, which are amongst the best results mentioned in the literature. The enhanced electrochemical performance of one-step anodes is mainly attributed to unique microstructural features, namely small grain size (submicrometer scale even after firing at 1450 °C) and homogeneous phase distribution, which is expected to extend the triple-phase boundary length |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014-09 |
dc.date.accessioned.fl_str_mv |
2021-04-07T15:14:45Z |
dc.date.available.fl_str_mv |
2021-04-07T15:14:45Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MACEDO, Daniel A.; FIGUEIREDO, Filipe M.L.; PASKOCIMAS, Carlos A.; MARTINELLI, Antonio E.; NASCIMENTO, Rubens M.; MARQUES, Fernando M.B.. Ni–CGO cermet anodes from nanocomposite powders: microstructural and electrochemical assessment. Ceramics International, [S.L.], v. 40, n. 8, p. 13105-13113, set. 2014. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884214007330?via%3Dihub. Acesso em: 11 fev. 2021. http://dx.doi.org/10.1016/j.ceramint.2014.05.010 |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/handle/123456789/32078 |
dc.identifier.issn.none.fl_str_mv |
0272-8842 |
dc.identifier.doi.none.fl_str_mv |
10.1016/j.ceramint.2014.05.010 |
identifier_str_mv |
MACEDO, Daniel A.; FIGUEIREDO, Filipe M.L.; PASKOCIMAS, Carlos A.; MARTINELLI, Antonio E.; NASCIMENTO, Rubens M.; MARQUES, Fernando M.B.. Ni–CGO cermet anodes from nanocomposite powders: microstructural and electrochemical assessment. Ceramics International, [S.L.], v. 40, n. 8, p. 13105-13113, set. 2014. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884214007330?via%3Dihub. Acesso em: 11 fev. 2021. http://dx.doi.org/10.1016/j.ceramint.2014.05.010 0272-8842 10.1016/j.ceramint.2014.05.010 |
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https://repositorio.ufrn.br/handle/123456789/32078 |
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eng |
language |
eng |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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