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dc.contributor.authorCai, Zhuhua
dc.contributor.authorYildiz, Bilge
dc.contributor.authorLee, Wonyoung
dc.date.accessioned2013-10-30T12:48:49Z
dc.date.available2013-10-30T12:48:49Z
dc.date.issued2012-04
dc.identifier.issn1938-6737
dc.identifier.issn1938-5862
dc.identifier.urihttp://hdl.handle.net/1721.1/81861
dc.description.abstractWe investigated the effects of annealing and A-site stoichiometry on the surface heterostructures at (La0.8Sr0.2)yMnO3 (LSM, y≤1) dense thin films. While annealing at high temperatures induces cation segregation on LSM, A-site deficiency is hypothesized to reduce the level of Sr enrichment on the surface by providing more space in the bulk of LSM for this relatively large cation. Localized chemical analysis by Auger electron spectroscopy revealed the strong enrichment of Sr and Zr in annealing-induced particles on LSM surfaces. By systematically varying y from 1.0 to 0.95, A-site deficiency in LSM films was shown to suppress Sr segregation and decrease the density of these secondary phases on annealed LSM surfaces, suggesting a higher chemical stability of LSM surfaces with A-site deficiency. Our results contribute to understanding the elastic energy contributions to cation segregation on perovskite cathode surfaces, and to elucidating the role of surface chemical heterogeneities to the ORR kinetics.en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Office of Fossil Energy (Grant DE-NT0004117)en_US
dc.language.isoen_US
dc.publisherElectrochemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1149/1.3701331en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceMIT Web Domainen_US
dc.title(Invited) Role of Chemical Heterogeneities on Oxygen Reduction Kinetics on the Surface of Thin Film Cathodesen_US
dc.title.alternativeRole of Chemical Heterogeneities on Oxygen Reduction Kinetics on the Surface of Thin Film Cathodesen_US
dc.typeArticleen_US
dc.identifier.citationLee, W., Z. Cai, and B. Yildiz. “(Invited) Role of Chemical Heterogeneities on Oxygen Reduction Kinetics on the Surface of Thin Film Cathodes.” ECS Transactions 45, no. 1 (April 27, 2012): 405-412. © 2012 ECS - The Electrochemical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineeringen_US
dc.contributor.mitauthorCai, Zhuhuaen_US
dc.contributor.mitauthorYildiz, Bilgeen_US
dc.contributor.mitauthorLee, Wonyoungen_US
dc.relation.journalECS Transactionsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsLee, W.; Cai, Z.; Yildiz, B.en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-2688-5666
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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