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dc.contributor.authorBernuy-Lopez, Carlos
dc.contributor.authorRioja-Monllor, Laura
dc.contributor.authorNakamura, Takashi
dc.contributor.authorRicote, Sandrine
dc.contributor.authorO’Hayre, Ryan
dc.contributor.authorAmezawa, Koji
dc.contributor.authorEinarsrud, Mari-Ann
dc.contributor.authorGrande, Tor
dc.identifier.citationMaterials. 2018, 11 1-16.nb_NO
dc.description.abstractThe effect of A-site cation ordering on the cathode performance and chemical stability of A-site cation ordered LaBaCo2O5+δ and disordered La0.5Ba0.5CoO3−δ materials are reported. Symmetric half-cells with a proton-conducting BaZr0.9Y0.1O3−δ electrolyte were prepared by ceramic processing, and good chemical compatibility of the materials was demonstrated. Both A-site ordered LaBaCo2O5+δ and A-site disordered La0.5Ba0.5CoO3−δ yield excellent cathode performance with Area Specific Resistances as low as 7.4 and 11.5 Ω·cm2 at 400 °C and 0.16 and 0.32 Ω·cm2 at 600 °C in 3% humidified synthetic air respectively. The oxygen vacancy concentration, electrical conductivity, basicity of cations and crystal structure were evaluated to rationalize the electrochemical performance of the two materials. The combination of high-basicity elements and high electrical conductivity as well as sufficient oxygen vacancy concentration explains the excellent performance of both LaBaCo2O5+δ and La0.5Ba0.5CoO3−δ materials at high temperatures. At lower temperatures, oxygen-deficiency in both materials is greatly reduced, leading to decreased performance despite the high basicity and electrical conductivity. A-site cation ordering leads to a higher oxygen vacancy concentration, which explains the better performance of LaBaCo2O5+δ. Finally, the more pronounced oxygen deficiency of the cation ordered polymorph and the lower chemical stability at reducing conditions were confirmed by coulometric titration.nb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleEffect of Cation Ordering on the Performance and Chemical Stability of Layered Double Perovskite Cathodesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.relation.projectNorges forskningsråd: 228355nb_NO
dc.description.localcode© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
cristin.unitnameInstitutt for materialteknologi

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal