Cathode-Electrolyte Interfaces with CGO Barrier Layers in SOFC

Ruth Knibbe, Johan Hjelm, Mohan Menon, Nini Pryds, Martin Søgaard, Hsiang-Jen Wang, Kai Neufeld

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Electron microscopy characterization across the cathode–electrolyte interface of two different types of intermediate temperature solid oxide fuel cells (IT-SOFC) is performed to understand the origin of the cell performance disparity. One IT-SOFC cell had a sprayed-cosintered Ce0.90Gd0.01O1.95 (CGO10) barrier layer, the other had a barrier layer deposited by pulsed laser deposition (PLD) CGO10. Scanning electron microscopy, transmission electron microscopy (TEM), and electron backscattered diffraction (EBSD) investigations conclude that the major source of the cell performance difference is attributed to CGO–YSZ interdiffusion in the sprayed-cosintered barrier layer. From TEM and EBSD work, a dense CGO10 PLD layer is found to be deposited epitaxially on the 8YSZ electrolyte substrate—permitting a small amount of SrZrO3 formation and minimizing CGO–YSZ interdiffusion.
    Original languageEnglish
    JournalJournal of the American Ceramic Society
    Volume93
    Issue number9
    Pages (from-to)2877-2883
    ISSN0002-7820
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Solid Oxide Fuel Cells
    • Fuel Cells and hydrogen

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