Manufacturing and characterization of metal-supported solid oxide fuel cells

Peter Blennow Tullmar, Johan Hjelm, Trine Klemensø, Severine Ramousse, Alexander Kromp, André Leonide, André Weber

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    A metal-supported solid oxide fuel cell design offers competitive advantages, for example reduced material costs and improved robustness. This paper reports the performance and stability of a recently developed metal-supported cell design, based on a novel cermet anode, on a 25cm2 (1cm2/16cm2 active area) cell level. An electrochemical performance comparable to state-of-the-art anode-supported cells is demonstrated.Detailed electrochemical analysis allowed assignment of the overall polarization losses quantitatively to gas diffusion in the metal support, electrooxidation in the anode functional layer, oxygen reduction in the mixed ionic-electronic conducting cathode and an additional polarization process with a rather high relaxation frequency, which may be assigned to an insulating corrosion interlayer.The durability of the cells was investigated by means of galvanostatic operation for periods of up to 1000h as well as the dynamic behavior, such as redox-, load- and thermal cycling tests.The galvanostatic stability tests indicated a fair, but significant degradation rate (∼5% decrease in cell voltage/1000h at 650°C and 0.25Acm−2). Furthermore, the metal-supported cells underwent an endurance test of 100 redox cycles at 800°C without severe degradation nor total failure.
    Original languageEnglish
    JournalJournal of Power Sources
    Volume196
    Issue number17
    Pages (from-to)7117-7125
    ISSN0378-7753
    DOIs
    Publication statusPublished - 2011
    Event9th European Solid Oxide Fuel Cell Forum - Lucerne, Switzerland
    Duration: 29 Jun 20102 Jul 2010
    Conference number: 9
    http://www.efcf.com/past/

    Conference

    Conference9th European Solid Oxide Fuel Cell Forum
    Number9
    CountrySwitzerland
    CityLucerne
    Period29/06/201002/07/2010
    Internet address

    Keywords

    • Solid Oxide Fuel Cells

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