Physical Properties of Mixed Conductor Solid Oxide Fuel Cell Anodes of Doped CeO2

Mogens Bjerg Mogensen, Thomas Lindegaard, Uffe Rud Hansen, Gurli Mogensen

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    Abstract

    Samples of CeO2 doped with oxides such as CaO and Gd2O3 were prepared. Their conductivities and expansions onreduction were measured at 1000°C, and the thermal expansion coefficients in the range 50 to 1000°C were determined. Theionic and electronic conductivity were derived from curves of total conductivity vs. oxygen partial pressure. For both typesof conductivity a dependence on dopant valency was observed. The electronic conductivity was independent of dopantradius in contrast to the ionic which was highly dependent. These measured physical properties are compared with the idealrequirements for solid oxide fuel cell anodes. Not all requirements are fulfilled. Measures to compensate for this arediscussed.
    Original languageEnglish
    JournalJournal of The Electrochemical Society
    Volume141
    Issue number8
    Pages (from-to)2122-2128
    ISSN0013-4651
    DOIs
    Publication statusPublished - 1994

    Bibliographical note

    Copyright The Electrochemical Society, Inc. [1994]. 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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