Slurry spin coating of thin film yttria stabilized zirconia/gadolinia doped ceria bi-layer electrolytes for solid oxide fuel cells

Hyun Joong Kim, Manjin Kim, Ke Chean Neoh, Gwon Deok Han, Kiho Bae, Jong Mok Shin, Gyu Tae Kim, Joon Hyung Shim

    Research output: Contribution to journalArticlepeer-review

    70 Citations (Scopus)

    Abstract

    Thin ceramic bi-layered membrane comprising yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) is fabricated by the cost-effective slurry spin coating technique, and it is evaluated as an electrolyte of solid oxide fuel cells (SOFCs). It is demonstrated that the slurry spin coating method is capable of fabricating porous ceramic films by adjusting the content of ethyl-cellulose binders in the source slurry. The porous GDC layer deposited by spin coating under an optimal condition functions satisfactorily as a cathode-electrolyte interlayer in the test SOFC stack. A 2-μm-thick electrolyte membrane of the spin-coated YSZ/GDC bi-layer is successfully deposited as a dense and stable film directly on a porous NiO-YSZ anode support without any interlayers, and the SOFC produces power output over 200 mW cm−2 at 600 °C, with an open circuit voltage close to 1 V. Electrochemical impedance spectra analysis is conducted to evaluate the performance of the fuel cell components in relation with the microstructure of the spin-coated layers.

    Original languageEnglish
    Pages (from-to)401-407
    Number of pages7
    JournalJournal of Power Sources
    Volume327
    DOIs
    Publication statusPublished - 2016 Sept 30

    Bibliographical note

    Publisher Copyright:
    © 2016

    Keywords

    • Gadolinia-doped ceria
    • Solid oxide fuel cells
    • Spin coating
    • Yttria-stabilized zirconia

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Energy Engineering and Power Technology
    • Physical and Theoretical Chemistry
    • Electrical and Electronic Engineering

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