Ni-YSZ solid oxide fuel cell anode behavior upon redox cycling based on electrical characterization

Trine Klemensø, Mogens Bjerg Mogensen

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    Abstract

    Ni-YSZ cermets are a prevalent material used for solid oxide fuel cells. However, the cermet degrades upon redox cycling. The degradation is related to microstructural changes, but knowledge of the mechanisms has been limited. DC conductivity measurements were performed on cermets and cermets, where the Ni component was removed, before, during and after redox cycling the cermet. The cermet conductivity degraded over time due to sintering of the nickel phase. Following oxidizing events, the conductivity of the cermets improved, whereas the conductivity of the YSZ phase decreased. A model of the redox degradation mechanism was established based on the measurements.
    Original languageEnglish
    Title of host publicationProceedings of Materials Science and Technology 2006 Meeting
    Number of pages23
    Publication date2006
    Publication statusPublished - 2006
    EventMaterials science and technology (MS&T) 2006: Materials and systems - Cincinnati, OH, United States
    Duration: 15 Oct 200619 Oct 2006

    Conference

    ConferenceMaterials science and technology (MS&T) 2006: Materials and systems
    CountryUnited States
    CityCincinnati, OH
    Period15/10/200619/10/2006

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