Break down of losses in thin electrolyte SOFCs

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    Abstract

    The contributions of the individual components of the cell (anode, cathode, and electrolyte) to the cell resistance were determined experimentally, directly from impedance spectra obtained from a full cell. It was an anode supported thin electrolyte cell, consisting of a YSZ electrolyte, a Ni/YSZ cermet anode, and a LSM composite cathode. Additional, qualitative information was obtained using symmetric cells with LSM composite electrodes. The investigations were carried out in the temperature interval from 700 to 850 degrees C. The electrolyte and anode activation energies obtained were 0.9 and 1.1 eV, respectively, which is in relatively good agreement with literature values. The anode resistance was 0.24 Omega cm(2) and the cathode resistance was 0.58 Omega cm(2) at 700 degrees C, corresponding to 23% and 56% of the total resistance, respectively.
    Original languageEnglish
    JournalFuel Cells
    Volume6
    Issue number2
    Pages (from-to)141-145
    ISSN1615-6846
    DOIs
    Publication statusPublished - Apr 2006
    Event6th European Solid Oxide Fuel Cell Forum - Lucerne, Switzerland
    Duration: 28 Jun 20042 Jul 2004
    Conference number: 6
    http://www.efcf.com/past/

    Conference

    Conference6th European Solid Oxide Fuel Cell Forum
    Number6
    CountrySwitzerland
    CityLucerne
    Period28/06/200402/07/2004
    Internet address

    Keywords

    • anode
    • cathode
    • electrolyte
    • impedance spectroscopy

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