Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition

[EN] A detailed analysis of the electrical properties of the proton-conducting BaCeYO phase (BCY20) and the effects of Br doping has been undertaken. Members of the system of nominal stoichiometry BaCeYOBr (x = 0, 0.05, 0.1 and 0.2) were synthesised by a citrate-nitrate process and high-temperature...

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Autores: Triviño Peláez, Ángel, Pérez-Coll, Domingo, Mather, Glenn C.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/200986
Acceso en línea:http://hdl.handle.net/10261/200986
Access Level:acceso abierto
Palabra clave:Yttrium-doped barium cerate (BCY)
Bromium-doped BCY
Proton conducting electrolytes
Partial conductivitiesTransport number
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spelling Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine additionTriviño Peláez, ÁngelPérez-Coll, DomingoMather, Glenn C.Yttrium-doped barium cerate (BCY)Bromium-doped BCYProton conducting electrolytesPartial conductivitiesTransport number[EN] A detailed analysis of the electrical properties of the proton-conducting BaCeYO phase (BCY20) and the effects of Br doping has been undertaken. Members of the system of nominal stoichiometry BaCeYOBr (x = 0, 0.05, 0.1 and 0.2) were synthesised by a citrate-nitrate process and high-temperature annealing up to 1500 °C. X-ray diffraction revealed the formation of single-phase material with a monoclinically distorted perovskite structure (space group I2/m) with greater distortion for Br-synthesised phase. Significant contrasts in electrical behaviour and stability between BCY20 and Br-synthesised series members were also found. However, chemical analysis by total X-ray fluorescence spectroscopy indicated that only trace amounts of Br remain after synthesis, indicating that Br addition influences stoichiometry but not directly the physicochemical properties. Higher conductivity is observed for the Br-synthesised compositions in wet and dry oxidising conditions in the temperature range 300–900 °C, reaching a value of 5.8 S m at 800 °C for the x = 0.2 member in wet O (pHO ∼ 0.022 atm). Determination of partial-conductivity components indicated that, in humid conditions and low temperature, the conductivity of 20% Br-synthesised material is principally protonic (t = 0.91 at 600 °C and pO = 0.2 atm) and superior to that of BCY20. Mixed oxide-ionic-electronic conductivity dominates at high pO (1 atm) and oxide-ionic conductivity at low pO (∼10 atm) in the temperature range 600–900 °C for both BCY and Br-doped samples. Stability was found to be poorer in CO for the Br-synthesised phases as determined by thermogravimetry and prolonged conductivity measurements.We thank MINECO in Spain forfinancial support (project ENE2015-66183-R and predoctoral grant BES-2016-077023). Wewould also like to thank Dr Ramón Fernández Ruiz of the Autonomous University of Madrid for useful discussions concerning TXRF measurements.Elsevier BVMinisterio de Economía y Competitividad (España)Pérez-Coll, Domingo [0000-0001-5331-2516]Mather, Glenn Christopher [0000-0003-0779-4619]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020192020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/200986reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ENE2015-66183-Rhttp://dx.doi.org/10.1016/j.actamat.2019.01.028Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2009862026-05-22T06:33:51Z
dc.title.none.fl_str_mv Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
title Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
spellingShingle Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
Triviño Peláez, Ángel
Yttrium-doped barium cerate (BCY)
Bromium-doped BCY
Proton conducting electrolytes
Partial conductivitiesTransport number
title_short Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
title_full Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
title_fullStr Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
title_full_unstemmed Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
title_sort Electrical properties of proton-conducting BaCe0.8Y0.2O3-δ and the effects of bromine addition
dc.creator.none.fl_str_mv Triviño Peláez, Ángel
Pérez-Coll, Domingo
Mather, Glenn C.
author Triviño Peláez, Ángel
author_facet Triviño Peláez, Ángel
Pérez-Coll, Domingo
Mather, Glenn C.
author_role author
author2 Pérez-Coll, Domingo
Mather, Glenn C.
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Pérez-Coll, Domingo [0000-0001-5331-2516]
Mather, Glenn Christopher [0000-0003-0779-4619]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Yttrium-doped barium cerate (BCY)
Bromium-doped BCY
Proton conducting electrolytes
Partial conductivitiesTransport number
topic Yttrium-doped barium cerate (BCY)
Bromium-doped BCY
Proton conducting electrolytes
Partial conductivitiesTransport number
description [EN] A detailed analysis of the electrical properties of the proton-conducting BaCeYO phase (BCY20) and the effects of Br doping has been undertaken. Members of the system of nominal stoichiometry BaCeYOBr (x = 0, 0.05, 0.1 and 0.2) were synthesised by a citrate-nitrate process and high-temperature annealing up to 1500 °C. X-ray diffraction revealed the formation of single-phase material with a monoclinically distorted perovskite structure (space group I2/m) with greater distortion for Br-synthesised phase. Significant contrasts in electrical behaviour and stability between BCY20 and Br-synthesised series members were also found. However, chemical analysis by total X-ray fluorescence spectroscopy indicated that only trace amounts of Br remain after synthesis, indicating that Br addition influences stoichiometry but not directly the physicochemical properties. Higher conductivity is observed for the Br-synthesised compositions in wet and dry oxidising conditions in the temperature range 300–900 °C, reaching a value of 5.8 S m at 800 °C for the x = 0.2 member in wet O (pHO ∼ 0.022 atm). Determination of partial-conductivity components indicated that, in humid conditions and low temperature, the conductivity of 20% Br-synthesised material is principally protonic (t = 0.91 at 600 °C and pO = 0.2 atm) and superior to that of BCY20. Mixed oxide-ionic-electronic conductivity dominates at high pO (1 atm) and oxide-ionic conductivity at low pO (∼10 atm) in the temperature range 600–900 °C for both BCY and Br-doped samples. Stability was found to be poorer in CO for the Br-synthesised phases as determined by thermogravimetry and prolonged conductivity measurements.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/200986
url http://hdl.handle.net/10261/200986
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ENE2015-66183-R
http://dx.doi.org/10.1016/j.actamat.2019.01.028
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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