A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders
Autor(a) principal: | |
---|---|
Data de Publicação: | 2013 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/handle/123456789/32097 |
Resumo: | A comparative microstructural study between Ni–Ce0.9Gd0.1O1.95 (Ni–CGO) anodes obtained from NiO–CGO nanocomposite powders prepared by in situ one-step synthesis and by mechanical mixture (two-step synthesis) of NiO and CGO powders is reported. The open porosity and microstructure of sintered and reduced pellets were investigated as a function of the citric acid content used as pore forming agent. Nanosized crystallites for the one-step and two-step routes were around 18 nm and 24 nm against 16 nm and 37 nm, for CGO and NiO, respectively. Overall results show that both routes provided suitable microstructures either for anode-support, or for functional anodes for solid oxide fuel cells (SOFCs), with more versatile characteristics in the case of the one-step route. The electrical characterization of selected NiO–CGO samples, carried out between 90 and 260 °C by impedance spectroscopy, confirms electrical percolation of both phases in the composites. However, based on combined microstructural and impedance data, it seems clear that the one-step processing route is the best approach to make SOFC anodes with improved performance |
id |
UFRN_6dcc02390744e3fa046fc51958a5f6c5 |
---|---|
oai_identifier_str |
oai:https://repositorio.ufrn.br:123456789/32097 |
network_acronym_str |
UFRN |
network_name_str |
Repositório Institucional da UFRN |
repository_id_str |
|
spelling |
Macedo, Daniel Araújo deSouza, Graziele L.Cela, BeatrizPaskocimas, Carlos AlbertoMartinelli, Antonio EduardoFigueiredo, Filipe Miguel Henriques Lebre RamosMarques, Fernando M. B.Nascimento, Rubens Maribondo do2021-04-07T20:05:47Z2021-04-07T20:05:47Z2013-05MACEDO, Daniel A.; SOUZA, Graziele L.; CELA, Beatriz; PASKOCIMAS, Carlos A.; MARTINELLI, Antonio E.; FIGUEIREDO, Filipe M.L.; MARQUES, Fernando M.B.; NASCIMENTO, Rubens M.. A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders. Ceramics International, [S.L.], v. 39, n. 4, p. 4321-4328, maio 2013. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884212012564?via%3Dihub. Acesso em: 18 fev. 2021. http://dx.doi.org/10.1016/j.ceramint.2012.11.014.0272-8842https://repositorio.ufrn.br/handle/123456789/3209710.1016/j.ceramint.2012.11.014ElsevierOne-step synthesisNi–CGO anodeMicrostructureImpedance spectroscopyA versatile route for the preparation of Ni–CGO cermets from nanocomposite powdersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleA comparative microstructural study between Ni–Ce0.9Gd0.1O1.95 (Ni–CGO) anodes obtained from NiO–CGO nanocomposite powders prepared by in situ one-step synthesis and by mechanical mixture (two-step synthesis) of NiO and CGO powders is reported. The open porosity and microstructure of sintered and reduced pellets were investigated as a function of the citric acid content used as pore forming agent. Nanosized crystallites for the one-step and two-step routes were around 18 nm and 24 nm against 16 nm and 37 nm, for CGO and NiO, respectively. Overall results show that both routes provided suitable microstructures either for anode-support, or for functional anodes for solid oxide fuel cells (SOFCs), with more versatile characteristics in the case of the one-step route. The electrical characterization of selected NiO–CGO samples, carried out between 90 and 260 °C by impedance spectroscopy, confirms electrical percolation of both phases in the composites. However, based on combined microstructural and impedance data, it seems clear that the one-step processing route is the best approach to make SOFC anodes with improved performanceengreponame: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/123456789/32097/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/32097/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTVersatileRoutePreparation_PASKOCIMAS_2014.pdf.txtVersatileRoutePreparation_PASKOCIMAS_2014.pdf.txtExtracted texttext/plain36343https://repositorio.ufrn.br/bitstream/123456789/32097/4/VersatileRoutePreparation_PASKOCIMAS_2014.pdf.txtcd838b84944db481453c452f7e0d2808MD54THUMBNAILVersatileRoutePreparation_PASKOCIMAS_2014.pdf.jpgVersatileRoutePreparation_PASKOCIMAS_2014.pdf.jpgGenerated Thumbnailimage/jpeg1695https://repositorio.ufrn.br/bitstream/123456789/32097/5/VersatileRoutePreparation_PASKOCIMAS_2014.pdf.jpgd46cd4339ba3464b22d34f7c59423a19MD55123456789/320972023-01-30 19:02:42.69oai:https://repositorio.ufrn.br:123456789/32097Tk9OLUVYQ0xVU0lWRSBESVNUUklCVVRJT04gTElDRU5TRQoKCkJ5IHNpZ25pbmcgYW5kIGRlbGl2ZXJpbmcgdGhpcyBsaWNlbnNlLCBNci4gKGF1dGhvciBvciBjb3B5cmlnaHQgaG9sZGVyKToKCgphKSBHcmFudHMgdGhlIFVuaXZlcnNpZGFkZSBGZWRlcmFsIFJpbyBHcmFuZGUgZG8gTm9ydGUgdGhlIG5vbi1leGNsdXNpdmUgcmlnaHQgb2YKcmVwcm9kdWNlLCBjb252ZXJ0IChhcyBkZWZpbmVkIGJlbG93KSwgY29tbXVuaWNhdGUgYW5kIC8gb3IKZGlzdHJpYnV0ZSB0aGUgZGVsaXZlcmVkIGRvY3VtZW50IChpbmNsdWRpbmcgYWJzdHJhY3QgLyBhYnN0cmFjdCkgaW4KZGlnaXRhbCBvciBwcmludGVkIGZvcm1hdCBhbmQgaW4gYW55IG1lZGl1bS4KCmIpIERlY2xhcmVzIHRoYXQgdGhlIGRvY3VtZW50IHN1Ym1pdHRlZCBpcyBpdHMgb3JpZ2luYWwgd29yaywgYW5kIHRoYXQKeW91IGhhdmUgdGhlIHJpZ2h0IHRvIGdyYW50IHRoZSByaWdodHMgY29udGFpbmVkIGluIHRoaXMgbGljZW5zZS4gRGVjbGFyZXMKdGhhdCB0aGUgZGVsaXZlcnkgb2YgdGhlIGRvY3VtZW50IGRvZXMgbm90IGluZnJpbmdlLCBhcyBmYXIgYXMgaXQgaXMKdGhlIHJpZ2h0cyBvZiBhbnkgb3RoZXIgcGVyc29uIG9yIGVudGl0eS4KCmMpIElmIHRoZSBkb2N1bWVudCBkZWxpdmVyZWQgY29udGFpbnMgbWF0ZXJpYWwgd2hpY2ggZG9lcyBub3QKcmlnaHRzLCBkZWNsYXJlcyB0aGF0IGl0IGhhcyBvYnRhaW5lZCBhdXRob3JpemF0aW9uIGZyb20gdGhlIGhvbGRlciBvZiB0aGUKY29weXJpZ2h0IHRvIGdyYW50IHRoZSBVbml2ZXJzaWRhZGUgRmVkZXJhbCBkbyBSaW8gR3JhbmRlIGRvIE5vcnRlIHRoZSByaWdodHMgcmVxdWlyZWQgYnkgdGhpcyBsaWNlbnNlLCBhbmQgdGhhdCB0aGlzIG1hdGVyaWFsIHdob3NlIHJpZ2h0cyBhcmUgb2YKdGhpcmQgcGFydGllcyBpcyBjbGVhcmx5IGlkZW50aWZpZWQgYW5kIHJlY29nbml6ZWQgaW4gdGhlIHRleHQgb3IKY29udGVudCBvZiB0aGUgZG9jdW1lbnQgZGVsaXZlcmVkLgoKSWYgdGhlIGRvY3VtZW50IHN1Ym1pdHRlZCBpcyBiYXNlZCBvbiBmdW5kZWQgb3Igc3VwcG9ydGVkIHdvcmsKYnkgYW5vdGhlciBpbnN0aXR1dGlvbiBvdGhlciB0aGFuIHRoZSBVbml2ZXJzaWRhZGUgRmVkZXJhbCBkbyBSaW8gR3JhbmRlIGRvIE5vcnRlLCBkZWNsYXJlcyB0aGF0IGl0IGhhcyBmdWxmaWxsZWQgYW55IG9ibGlnYXRpb25zIHJlcXVpcmVkIGJ5IHRoZSByZXNwZWN0aXZlIGFncmVlbWVudCBvciBhZ3JlZW1lbnQuCgpUaGUgVW5pdmVyc2lkYWRlIEZlZGVyYWwgZG8gUmlvIEdyYW5kZSBkbyBOb3J0ZSB3aWxsIGNsZWFybHkgaWRlbnRpZnkgaXRzIG5hbWUgKHMpIGFzIHRoZSBhdXRob3IgKHMpIG9yIGhvbGRlciAocykgb2YgdGhlIGRvY3VtZW50J3MgcmlnaHRzCmRlbGl2ZXJlZCwgYW5kIHdpbGwgbm90IG1ha2UgYW55IGNoYW5nZXMsIG90aGVyIHRoYW4gdGhvc2UgcGVybWl0dGVkIGJ5CnRoaXMgbGljZW5zZQo=Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2023-01-30T22:02:42Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders |
title |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders |
spellingShingle |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders Macedo, Daniel Araújo de One-step synthesis Ni–CGO anode Microstructure Impedance spectroscopy |
title_short |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders |
title_full |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders |
title_fullStr |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders |
title_full_unstemmed |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders |
title_sort |
A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders |
author |
Macedo, Daniel Araújo de |
author_facet |
Macedo, Daniel Araújo de Souza, Graziele L. Cela, Beatriz Paskocimas, Carlos Alberto Martinelli, Antonio Eduardo Figueiredo, Filipe Miguel Henriques Lebre Ramos Marques, Fernando M. B. Nascimento, Rubens Maribondo do |
author_role |
author |
author2 |
Souza, Graziele L. Cela, Beatriz Paskocimas, Carlos Alberto Martinelli, Antonio Eduardo Figueiredo, Filipe Miguel Henriques Lebre Ramos Marques, Fernando M. B. Nascimento, Rubens Maribondo do |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Macedo, Daniel Araújo de Souza, Graziele L. Cela, Beatriz Paskocimas, Carlos Alberto Martinelli, Antonio Eduardo Figueiredo, Filipe Miguel Henriques Lebre Ramos Marques, Fernando M. B. Nascimento, Rubens Maribondo do |
dc.subject.por.fl_str_mv |
One-step synthesis Ni–CGO anode Microstructure Impedance spectroscopy |
topic |
One-step synthesis Ni–CGO anode Microstructure Impedance spectroscopy |
description |
A comparative microstructural study between Ni–Ce0.9Gd0.1O1.95 (Ni–CGO) anodes obtained from NiO–CGO nanocomposite powders prepared by in situ one-step synthesis and by mechanical mixture (two-step synthesis) of NiO and CGO powders is reported. The open porosity and microstructure of sintered and reduced pellets were investigated as a function of the citric acid content used as pore forming agent. Nanosized crystallites for the one-step and two-step routes were around 18 nm and 24 nm against 16 nm and 37 nm, for CGO and NiO, respectively. Overall results show that both routes provided suitable microstructures either for anode-support, or for functional anodes for solid oxide fuel cells (SOFCs), with more versatile characteristics in the case of the one-step route. The electrical characterization of selected NiO–CGO samples, carried out between 90 and 260 °C by impedance spectroscopy, confirms electrical percolation of both phases in the composites. However, based on combined microstructural and impedance data, it seems clear that the one-step processing route is the best approach to make SOFC anodes with improved performance |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-05 |
dc.date.accessioned.fl_str_mv |
2021-04-07T20:05:47Z |
dc.date.available.fl_str_mv |
2021-04-07T20:05:47Z |
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.; SOUZA, Graziele L.; CELA, Beatriz; PASKOCIMAS, Carlos A.; MARTINELLI, Antonio E.; FIGUEIREDO, Filipe M.L.; MARQUES, Fernando M.B.; NASCIMENTO, Rubens M.. A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders. Ceramics International, [S.L.], v. 39, n. 4, p. 4321-4328, maio 2013. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884212012564?via%3Dihub. Acesso em: 18 fev. 2021. http://dx.doi.org/10.1016/j.ceramint.2012.11.014. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/handle/123456789/32097 |
dc.identifier.issn.none.fl_str_mv |
0272-8842 |
dc.identifier.doi.none.fl_str_mv |
10.1016/j.ceramint.2012.11.014 |
identifier_str_mv |
MACEDO, Daniel A.; SOUZA, Graziele L.; CELA, Beatriz; PASKOCIMAS, Carlos A.; MARTINELLI, Antonio E.; FIGUEIREDO, Filipe M.L.; MARQUES, Fernando M.B.; NASCIMENTO, Rubens M.. A versatile route for the preparation of Ni–CGO cermets from nanocomposite powders. Ceramics International, [S.L.], v. 39, n. 4, p. 4321-4328, maio 2013. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884212012564?via%3Dihub. Acesso em: 18 fev. 2021. http://dx.doi.org/10.1016/j.ceramint.2012.11.014. 0272-8842 10.1016/j.ceramint.2012.11.014 |
url |
https://repositorio.ufrn.br/handle/123456789/32097 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRN instname:Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
instname_str |
Universidade Federal do Rio Grande do Norte (UFRN) |
instacron_str |
UFRN |
institution |
UFRN |
reponame_str |
Repositório Institucional da UFRN |
collection |
Repositório Institucional da UFRN |
bitstream.url.fl_str_mv |
https://repositorio.ufrn.br/bitstream/123456789/32097/2/license_rdf https://repositorio.ufrn.br/bitstream/123456789/32097/3/license.txt https://repositorio.ufrn.br/bitstream/123456789/32097/4/VersatileRoutePreparation_PASKOCIMAS_2014.pdf.txt https://repositorio.ufrn.br/bitstream/123456789/32097/5/VersatileRoutePreparation_PASKOCIMAS_2014.pdf.jpg |
bitstream.checksum.fl_str_mv |
4d2950bda3d176f570a9f8b328dfbbef e9597aa2854d128fd968be5edc8a28d9 cd838b84944db481453c452f7e0d2808 d46cd4339ba3464b22d34f7c59423a19 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN) |
repository.mail.fl_str_mv |
|
_version_ |
1797777004556189696 |