Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity

In this paper, 8 mol% yttria cubic stabilized zirconia (8YCSZ) composites with reduced graphene oxide (rGO) contents up to 10 vol% were consolidated by spark plasma sintering (SPS) at two different temperatures with the aim of evaluating the relationship of their electrical properties with the graph...

ver descrição completa

Detalhes bibliográficos
Autores: Coto-Ruiz, Francisco Javier, De la Cruz-Blanco, Ana, Moriche Tirado, Rocío, Morales Rodríguez, Ana, Poyato Galán, Rosalía
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Recursos:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/176974
Acesso em linha:https://hdl.handle.net/11441/176974
https://doi.org/10.3390/nano15171314
Access Level:acceso abierto
Palavra-chave:Graphene
Zirconia
Spark plasma sintering
Microstructure
Electrical conductivity
id ES_3901ca02b663dae7672e9fdcf91c0617
oai_identifier_str oai:idus.us.es:11441/176974
network_acronym_str ES
network_name_str España
repository_id_str
spelling Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical ConductivityCoto-Ruiz, Francisco JavierDe la Cruz-Blanco, AnaMoriche Tirado, RocíoMorales Rodríguez, AnaPoyato Galán, RosalíaGrapheneZirconiaSpark plasma sinteringMicrostructureElectrical conductivityIn this paper, 8 mol% yttria cubic stabilized zirconia (8YCSZ) composites with reduced graphene oxide (rGO) contents up to 10 vol% were consolidated by spark plasma sintering (SPS) at two different temperatures with the aim of evaluating the relationship of their electrical properties with the graphene content, the rGO crystallinity, and the microstructural features. Successful in situ reduction of GO was accomplished during SPS, and highly densified composites with homogeneous rGO distribution, even at the highest contents, were obtained. The electrical properties were analyzed using impedance spectroscopy. Measurements were taken up to 700 °C, revealing an inductive response for the composites with 5 and 10 vol% rGO and a capacitive response for the composites with 1 and 2.5 vol% rGO. The results indicate that, along with the ionic conduction typical of zirconia, there are additional polarization mechanisms associated with the presence of graphene at ceramic grain boundaries that substantially modify the impedance response. A minor electronic conductivity contribution was identified in the composites below the percolation threshold. These characteristics make the 8YCSZ composites promising candidates for application as SOFC components, as ceramic interconnects when the graphene content is above the percolation threshold, or as electrolytes when the graphene content is below this limit.MDPIFísica de la Materia CondensadaMinisterio de Ciencia e Innovación (MICIN). EspañaAgencia Estatal de Investigación. EspañaEuropean Union (UE)2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/176974https://doi.org/10.3390/nano15171314reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésCoto-Ruiz, F.J., De la Cruz-Blanco, A.,...,Poyato Galán, R. (2025). Dataset of Microstructural study and impedance spectroscopy of zirconia/graphene composites. idUS (Depósito de Investigación de la Universidad de Sevilla). https://doi.org/10.12795/11441/176956.PID2022–140191NB-I00https://doi.org/10.3390/nano15171314info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1769742026-06-17T12:51:07Z
dc.title.none.fl_str_mv Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
title Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
spellingShingle Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
Coto-Ruiz, Francisco Javier
Graphene
Zirconia
Spark plasma sintering
Microstructure
Electrical conductivity
title_short Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
title_full Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
title_fullStr Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
title_full_unstemmed Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
title_sort Graphene/Zirconia Composites for Components in Solid Oxide Fuel Cells: Microstructure and Electrical Conductivity
dc.creator.none.fl_str_mv Coto-Ruiz, Francisco Javier
De la Cruz-Blanco, Ana
Moriche Tirado, Rocío
Morales Rodríguez, Ana
Poyato Galán, Rosalía
author Coto-Ruiz, Francisco Javier
author_facet Coto-Ruiz, Francisco Javier
De la Cruz-Blanco, Ana
Moriche Tirado, Rocío
Morales Rodríguez, Ana
Poyato Galán, Rosalía
author_role author
author2 De la Cruz-Blanco, Ana
Moriche Tirado, Rocío
Morales Rodríguez, Ana
Poyato Galán, Rosalía
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Física de la Materia Condensada
Ministerio de Ciencia e Innovación (MICIN). España
Agencia Estatal de Investigación. España
European Union (UE)
dc.subject.none.fl_str_mv Graphene
Zirconia
Spark plasma sintering
Microstructure
Electrical conductivity
topic Graphene
Zirconia
Spark plasma sintering
Microstructure
Electrical conductivity
description In this paper, 8 mol% yttria cubic stabilized zirconia (8YCSZ) composites with reduced graphene oxide (rGO) contents up to 10 vol% were consolidated by spark plasma sintering (SPS) at two different temperatures with the aim of evaluating the relationship of their electrical properties with the graphene content, the rGO crystallinity, and the microstructural features. Successful in situ reduction of GO was accomplished during SPS, and highly densified composites with homogeneous rGO distribution, even at the highest contents, were obtained. The electrical properties were analyzed using impedance spectroscopy. Measurements were taken up to 700 °C, revealing an inductive response for the composites with 5 and 10 vol% rGO and a capacitive response for the composites with 1 and 2.5 vol% rGO. The results indicate that, along with the ionic conduction typical of zirconia, there are additional polarization mechanisms associated with the presence of graphene at ceramic grain boundaries that substantially modify the impedance response. A minor electronic conductivity contribution was identified in the composites below the percolation threshold. These characteristics make the 8YCSZ composites promising candidates for application as SOFC components, as ceramic interconnects when the graphene content is above the percolation threshold, or as electrolytes when the graphene content is below this limit.
publishDate 2025
dc.date.none.fl_str_mv 2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/176974
https://doi.org/10.3390/nano15171314
url https://hdl.handle.net/11441/176974
https://doi.org/10.3390/nano15171314
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Coto-Ruiz, F.J., De la Cruz-Blanco, A.,...,Poyato Galán, R. (2025). Dataset of Microstructural study and impedance spectroscopy of zirconia/graphene composites. idUS (Depósito de Investigación de la Universidad de Sevilla). https://doi.org/10.12795/11441/176956.
PID2022–140191NB-I00
https://doi.org/10.3390/nano15171314
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406137605947392
score 15,81155

Registos relacionados