Strontium Titanate-based Composite Anodes for Solid Oxide Fuel Cells

Peter Blennow Tullmar, Kent Kammer Hansen, L.R. Wallenberg, Mogens Bjerg Mogensen

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    Surfactant-assisted infiltration of Gd-doped ceria (CGO) in Nb-doped SrTiO3 (STN) was investigated as a potential fuel electrode for solid oxide fuel cells (SOFC). An electronically conductive backbone structure of STN was first fabricated at high temperatures and then combined with the mixed conducting and electrochemically active nano-sized CGO phase at low temperatures. Symmetrical cell measurements at open circuit voltage (OCV), showed that the electrochemical activity was maintained or even improved compared to Ni/YSZ fuel electrodes. The novel electrode had an electrode polarization resistance of 0.12 Omegacm2 and 0.44 Omegacm2 in humidified H2 at 850 ºC and 650 ºC, respectively. In addition, the ceramic composite electrode was shown to be redox stable. The electrode was actually activated with redox cycles at 650 ºC. The ceramic electrode structure thus presents a potential solution to overcome some of the major limitations of the current Ni-YSZ cermet SOFC anodes.
    Original languageEnglish
    JournalECS Transactions
    Issue number26
    Pages (from-to)181-194
    Publication statusPublished - 2008
    Event213th ECS Meeting: B6 - Ionic and Mixed Conducting Ceramics 6 - Phoenix Convention Center, Phoenix, AZ, United States
    Duration: 18 May 200823 May 2008
    Conference number: 213th


    Conference213th ECS Meeting
    LocationPhoenix Convention Center
    Country/TerritoryUnited States
    CityPhoenix, AZ
    Internet address

    Bibliographical note

    Copyright The Electrochemical Society, Inc. [2008]. 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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