Modifications of interface chemistry of LSM–YSZ composite by ceria nanoparticles

Christina Knöfel, Hsiang-Jen Wang, Karl Tor Sune Thydén, Mogens Bjerg Mogensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A porous composite electrode LSM–YSZ (lanthanum strontium manganite and yttria stabilized zirconia) was impregnated with different amounts of SDC (samarium substituted ceria) nanoparticles. The materials were investigated with X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy to determine the microstructure, the interface chemistry and the surface chemistry of the various impregnated samples. The SDC nanoparticles cover the surface of the LSM–YSZ backbone to a large extent; they are approximately 5–20 nm in diameter and have a cubic crystal structure. Low concentrations of lanthanum and manganese originating from LSM were detected within SDC particles. It was also observed that the relative atomic concentration of strontium increased on the LSM–YSZ surface with increasing amount of SDC nanoparticles. These findings are related to the applied nanoparticle impregnation method. It is indicated that interactions between surfactant, nanoparticles, impregnation solution and the LSM–YSZ composite take place which can locally affect the surface and interface chemistry of the investigated materials.
    Original languageEnglish
    JournalSolid State Ionics
    Volume195
    Issue number1
    Pages (from-to)36-42
    ISSN0167-2738
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Solid Oxide Fuel Cells

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