From theory to experiment: BaFe0.125Co0.125Zr0.75O3-delta, a highly promising cathode for intermediate temperature SOFCs

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dc.contributor.authorSánchez Ahijón, Elena
dc.contributor.authorMarín Gamero, Rafael
dc.contributor.authorMolero Sánchez, Beatriz
dc.contributor.authorÁvila Brande, David
dc.contributor.authorManjón Sanz, Alicia
dc.contributor.authorFernández Díaz, M. Teresa
dc.contributor.authorMorán, Emilio
dc.contributor.authorSchmidt, Rainer
dc.contributor.authorPrado Gonjal, Jesús De La Paz
dc.date.accessioned2023-06-16T15:17:39Z
dc.date.available2023-06-16T15:17:39Z
dc.date.issued2020-02-14
dc.descriptionThis journal is © The Royal Society of Chemistry 20xx. This research was funded by the Spanish Ministry of Science, Innovation and Universities through grants MAT2017-87134-C2-2-R, MAT2017-84385-R and MAT2016-78362-C4-4R. JPG would also like to thank the Community of Madrid for granting an "Atracción de Talento" fellowship (2017-T2-IND-5597). The authors wish to express their gratitude to the ALBA synchrotron, ILL neutron facilities and Centro Nacional de Microscopía Electrónica (CNME) at the Universidad Complutense de Madrid (UCM). We thank José Antonio Alonso for useful discussion, Jacobo Santamaría, Carlos León and Alberto Rivera-Calzada for allowing the use of and helping with the Novocontrol impedance analyzer and Susana García Martin for allowing the use of and helping with the Solartron 1255 analyser.
dc.description.abstractIn a recent theoretical study [Jacobs et al., Adv. Energy Mater., 2018, 8, 1702708], BaFe0.125Co0.125Zr0.75O3-delta was predicted to be a stable phase with outstanding performance as an auspicious cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). It is shown here that the theoretical predictions are valid. The material can be synthesized by the citrate method as a single cubic Pm3m phase with a significant amount of oxygen vacancies, randomly distributed in the anionic sublattice facilitating oxygen vacancy conduction. A thermal expansion coefficient of 8.1 x 10(-6) K-1 suggests acceptable compatibility with common electrolytes. Electrochemical impedance spectroscopy of symmetrical cells gives an area-specific resistance of 0.33 Omega cm(2) at 700 degrees C and 0.13 Omega cm(2) at 800 degrees C. These values are reduced to 0.13 Omega cm(2) at 700 degrees C and 0.05 Omega cm(2) at 800 degrees C when the material is mixed with 30 wt% Ce0.9Gd0.1O2-delta.
dc.description.departmentDepto. de Física de Materiales
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.sponsorshipComunidad de Madrid
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/60383
dc.identifier.doi10.1039/c9ta12208
dc.identifier.issn2050-7496 (Online) 2050-7488(Print)
dc.identifier.officialurlhttps://doi.org/10.1039/c9ta12208g
dc.identifier.relatedurlhttps://pubs.rsc.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6221
dc.issue.number6
dc.journal.titleJournal of Materials Chemistry A
dc.language.isoeng
dc.page.final3420
dc.page.initial3413
dc.publisherRSC
dc.relation.projectID(MAT2017-87134-C2-2-R; MAT2017-84385-R; MAT2016-78362-C4-4R)
dc.relation.projectID2017-T2-IND-5597
dc.rights.accessRightsopen access
dc.subject.cdu538.9
dc.subject.keywordOxide fuel-cells
dc.subject.keywordCrystal-structure
dc.subject.keywordOxygen reduction
dc.subject.keywordComposite cathodes
dc.subject.keywordPerovskite
dc.subject.keywordPerformance
dc.subject.keywordConductivity
dc.subject.keywordOptimization
dc.subject.keywordLa1-xsrxmno3
dc.subject.keywordElectrolyte
dc.subject.ucmFísica de materiales
dc.titleFrom theory to experiment: BaFe0.125Co0.125Zr0.75O3-delta, a highly promising cathode for intermediate temperature SOFCs
dc.typejournal article
dc.volume.number8
dspace.entity.typePublication
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relation.isAuthorOfPublicationf02e4483-bcce-4572-b950-11c9693588ee
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relation.isAuthorOfPublication.latestForDiscoveryd20ad14d-1b00-4f7b-9e91-a33eec6b0529
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