Gd0.6Sr0.4Fe0.8Co0.2O3-δ: A novel type of SOFC cathode

Kent Kammer Hansen, Martin Søgaard, Mogens Bjerg Mogensen

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    Abstract

    The fabrication and electrochemical activity of a type of solid oxide fuel cell (SOFC) cathode is described in this paper. In search of new cathodes a Gd0.6Sr0.4Fe0.8Co0.2O3-delta compound was synthesized using the glycine-nitrate method. It turned out that this was a two-phase compound consisting of two perovskite phases, a cubic and an orthorhombic phase, as shown by Rietveld refinements. These two phases were synthesized and a cone-shaped electrode study was undertaken. It was shown that the composite cathode had an electrochemical activity superior to that of the two single-phase perovskites, indicating that the unique microstructure of this type of cathode is essential for achieving high electrochemical activity toward the reduction of oxygen in a SOFC.
    Original languageEnglish
    JournalElectrochemical and Solid-State Letters
    Volume10
    Issue number8
    Pages (from-to)B119-B121
    ISSN1099-0062
    DOIs
    Publication statusPublished - 2007

    Bibliographical note

    Copyright The Electrochemical Society, Inc. [2007]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

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