Characterization of Nd1-xSrxMnO3 +/-delta SOFC cathode materials

Kostogloudis, GC; Ftikos, C

dc.contributor.author	Kostogloudis, GC	en
dc.contributor.author	Ftikos, C	en
dc.date.accessioned	2014-03-01T01:48:50Z
dc.date.available	2014-03-01T01:48:50Z
dc.date.issued	1999	en
dc.identifier.issn	0955-2219	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25616
dc.subject	fuel cells	en
dc.subject	electrical conductivity	en
dc.subject	thermal expansion	en
dc.subject	CeO2	en
dc.subject.classification	Materials Science, Ceramics	en
dc.subject.other	OXIDATION-REDUCTION BEHAVIOR	en
dc.subject.other	SR-DOPED LAMNO3	en
dc.subject.other	DEFECT STRUCTURE	en
dc.subject.other	FUEL-CELLS	en
dc.subject.other	LANTHANUM MANGANITE	en
dc.subject.other	PEROVSKITE	en
dc.subject.other	NONSTOICHIOMETRY	en
dc.subject.other	OXIDE	en
dc.subject.other	STABILITY	en
dc.subject.other	TRANSITION	en
dc.title	Characterization of Nd1-xSrxMnO3 +/-delta SOFC cathode materials	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The crystal structure, thermal expansion behavior and electrical conductivity of Nd1-xSrxMnO3+/-delta (x = 0-0.5) perovskite oxides were investigated The chemical compatibility of the compositions with 40 and 50 mol% Sr with Gd2O3 doped CeO2 (CGO) electrolyte was also studied. An orthorhombic GdFeO3-type symmetry (space group Pbnm, z=4) was identified for all perovskite oxides, and the lattice parameters were determined. As the level of Sr doping increases, the pseudo-cubic lattice constant decreases, and the thermal expansion coefficient increases. The electrical conductivity can be described by the small polaron hopping conductivity model. The conductivity increases on increasing Sr doping, while the activation energy decreases. The compositions with 40 and 50 mol% Sr show very good thermal expansion and chemical compatibility with CGO electrolyte and can be considered as candidate intermediate temperature solid oxide fuel cell cathode materials. (C) 1999 Elsevier Science Limited All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY	en
dc.identifier.isi	ISI:000079458600012	en
dc.identifier.volume	19	en
dc.identifier.issue	4	en
dc.identifier.spage	497	en
dc.identifier.epage	505	en