Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/29080
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dc.contributor.authorArias-Serrano, Blanca I.pt_PT
dc.contributor.authorKravchenko, Ekaterinapt_PT
dc.contributor.authorZakharchuk, Kirylpt_PT
dc.contributor.authorGrins, Jekabspt_PT
dc.contributor.authorSvensson, Gunnarpt_PT
dc.contributor.authorPankov, Vladimirpt_PT
dc.contributor.authorYaremchenko, Alekseypt_PT
dc.date.accessioned2020-08-19T14:56:17Z-
dc.date.available2020-08-19T14:56:17Z-
dc.date.issued2019-
dc.identifier.issn1938-5862pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/29080-
dc.description.abstractRuddlesden-Popper Nd0.8Sr1.2Ni0.8M0.2O4-δ (M = Ni, Co, Fe) nickelates have been characterized as prospective oxygen electrode materials for solid electrolyte cells. XRD studies showed that these oxides retain tetragonal K2NiF4-type structure in air until at least 900°C. Average thermal expansion coefficients of Nd0.8Sr1.2Ni0.8M0.2O4-δ calculated from the structural data are in the range 14.5-15.8 ppm/K. TGA studies revealed that these nickelates are oxygen-deficient in air at temperature above 700°C but tends to oxygen stoichiometry or minor excess on cooling. Incorporation of cobalt or iron into nickel sublattice of Nd0.8Sr1.2NiO4-δ reduces oxygen deficiency and electrical conductivity. Electrochemical impedance spectroscopy studies of symmetrical cells showed that porous Nd0.8Sr1.2Ni0.8M0.2O4-δ electrodes applied onto Ce0.9Gd0.1O2-δ electrolyte exhibit quite similar performance, with lowest values of polarization resistance (0.8 Ω⸱cm2 at 800°C) observed for M = Ni. The polarization resistance can be further decreased (down to 0.04 Ω⸱cm2 at 800°C for M = Ni) by surface modification with PrOx.pt_PT
dc.language.isoengpt_PT
dc.publisherElectrochemical Societypt_PT
dc.relationPOCI-01-0145-FEDER-032295pt_PT
dc.relationUID/CTM/50011/2019pt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleOxygen-deficient Nd0.8Sr1.2Ni0.8M0.2O4-δ (M = Ni, Co, Fe) nickelates as oxygen electrode materials for SOFC/SOECpt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.firstPage2387pt_PT
degois.publication.issue1pt_PT
degois.publication.lastPage2397pt_PT
degois.publication.titleECS Transactionspt_PT
degois.publication.volume91pt_PT
dc.identifier.doi10.1149/09101.2387ecstpt_PT
dc.identifier.essn1938-6737pt_PT
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