An in situ diffraction study of a solid oxide fuel cell system

L. Sörby, F.W. Poulsen, H.F. Poulsen, S. Garbe, J.O. Thomas

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    Abstract

    The design of a synchrotron diffraction experiment on a working SOFC air-electrode is outlined. A large number of diffraction data sets were collected successfully from LSM/YSZ/Ag cells under different polarization states at 850 degrees C. Systematic changes are observed in lattice parameters and FWHM's for the LSM phase when the cell is polarized. The peak positions for the YSZ electrode are unchanged throughout the entire experiment. This is the first experimental evidence that oxygen stoichiometry in LSM is strongly influenced by the electrochemical reactions which take place. The cell parameters increase under reducing conditions, due to a decrease in the oxygen content of the LSM. All observed changes seem to be reversible.
    Original languageEnglish
    Title of host publicationProceedings of 5th European Powder Diffraction Conference
    Volume278-281
    PublisherTranstec Publications LTD
    Publication date1998
    Pages408-413
    ISBN (Print)0-87849-807-9
    Publication statusPublished - 1998
    Event5th European Powder Diffraction Conference - Parma, Italy
    Duration: 25 May 199728 May 1997
    Conference number: 5

    Conference

    Conference5th European Powder Diffraction Conference
    Number5
    CountryItaly
    CityParma
    Period25/05/199728/05/1997
    SeriesMaterials Science Forum
    ISSN0255-5476

    Cite this

    Sörby, L., Poulsen, F. W., Poulsen, H. F., Garbe, S., & Thomas, J. O. (1998). An in situ diffraction study of a solid oxide fuel cell system. In Proceedings of 5th European Powder Diffraction Conference (Vol. 278-281, pp. 408-413). Transtec Publications LTD. Materials Science Forum