Solid oxide fuel cell performance under severe operating conditions

Søren Koch, P.V. Hendriksen, Mogens Bjerg Mogensen, Yi-Lin Liu, N. Dekker, B. Rietveld, B. de Haart, F. Tietz

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    The performance and degradation of Solid Oxide Fuel Cells (SOFC) were studied under severe operating conditions. The cells studied were manufactured in a small series by ECN, in the framework of the EU funded CORE-SOFC project. The cells were of the anode-supported type with a double layer LSM cathode. They were operated at 750 °C or 850 °C in hydrogen with 5% or 50% water at current densities ranging from 0.25 A cm–2 to 1 A cm–2 for periods of 300 hours or more. The area specific cell resistance, corrected for fuel utilisation, ranged between 0.20 Ω cm2 and 0.34 Ω cm2 at 850 °C and 520 mV, and between 0.51 Ω cm2 and 0.92 Ω cm2 at 750 °C and 520 mV.

    The degradation of cell performance was found to be low (ranging from 0 to 8%/1,000 hours) at regular operating conditions. Voltage degradation rates of 20 to 40%/1,000 hours were observed under severe operating conditions, depending on the test conditions.

    Data analysis revealed a critical cell voltage of ca 750 mV, above which the degradation rates were trivial, but below which they were significant.

    Some cells were also tested using a different procedure to that usually applied at Risø. This gave a different aging behaviour, indicating that the detailed test circumstances may be decisive to the outcome.

    Original languageEnglish
    JournalFuel Cells
    Volume6
    Issue number2
    Pages (from-to)130-136
    ISSN1615-6846
    DOIs
    Publication statusPublished - 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

    • Accelerated test
    • Anode
    • Cathode activation
    • Degradation
    • Impedance spectroscopy
    • SOFC

    Cite this

    Koch, Søren ; Hendriksen, P.V. ; Mogensen, Mogens Bjerg ; Liu, Yi-Lin ; Dekker, N. ; Rietveld, B. ; Haart, B. de ; Tietz, F. / Solid oxide fuel cell performance under severe operating conditions. In: Fuel Cells. 2006 ; Vol. 6, No. 2. pp. 130-136.
    @inproceedings{bfe63bd06b96416fa99b7d5caa656668,
    title = "Solid oxide fuel cell performance under severe operating conditions",
    abstract = "The performance and degradation of Solid Oxide Fuel Cells (SOFC) were studied under severe operating conditions. The cells studied were manufactured in a small series by ECN, in the framework of the EU funded CORE-SOFC project. The cells were of the anode-supported type with a double layer LSM cathode. They were operated at 750 °C or 850 °C in hydrogen with 5{\%} or 50{\%} water at current densities ranging from 0.25 A cm–2 to 1 A cm–2 for periods of 300 hours or more. The area specific cell resistance, corrected for fuel utilisation, ranged between 0.20 Ω cm2 and 0.34 Ω cm2 at 850 °C and 520 mV, and between 0.51 Ω cm2 and 0.92 Ω cm2 at 750 °C and 520 mV. The degradation of cell performance was found to be low (ranging from 0 to 8{\%}/1,000 hours) at regular operating conditions. Voltage degradation rates of 20 to 40{\%}/1,000 hours were observed under severe operating conditions, depending on the test conditions. Data analysis revealed a critical cell voltage of ca 750 mV, above which the degradation rates were trivial, but below which they were significant. Some cells were also tested using a different procedure to that usually applied at Ris{\o}. This gave a different aging behaviour, indicating that the detailed test circumstances may be decisive to the outcome.",
    keywords = "Br{\ae}ndselsceller og brint, Accelerated test, Anode, Cathode activation, Degradation, Impedance spectroscopy, SOFC",
    author = "S{\o}ren Koch and P.V. Hendriksen and Mogensen, {Mogens Bjerg} and Yi-Lin Liu and N. Dekker and B. Rietveld and Haart, {B. de} and F. Tietz",
    year = "2006",
    doi = "10.1002/fuce.200500112",
    language = "English",
    volume = "6",
    pages = "130--136",
    journal = "Fuel Cells",
    issn = "1615-6846",
    publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",
    number = "2",

    }

    Solid oxide fuel cell performance under severe operating conditions. / Koch, Søren; Hendriksen, P.V.; Mogensen, Mogens Bjerg; Liu, Yi-Lin; Dekker, N.; Rietveld, B.; Haart, B. de; Tietz, F.

    In: Fuel Cells, Vol. 6, No. 2, 2006, p. 130-136.

    Research output: Contribution to journalConference articleResearchpeer-review

    TY - GEN

    T1 - Solid oxide fuel cell performance under severe operating conditions

    AU - Koch, Søren

    AU - Hendriksen, P.V.

    AU - Mogensen, Mogens Bjerg

    AU - Liu, Yi-Lin

    AU - Dekker, N.

    AU - Rietveld, B.

    AU - Haart, B. de

    AU - Tietz, F.

    PY - 2006

    Y1 - 2006

    N2 - The performance and degradation of Solid Oxide Fuel Cells (SOFC) were studied under severe operating conditions. The cells studied were manufactured in a small series by ECN, in the framework of the EU funded CORE-SOFC project. The cells were of the anode-supported type with a double layer LSM cathode. They were operated at 750 °C or 850 °C in hydrogen with 5% or 50% water at current densities ranging from 0.25 A cm–2 to 1 A cm–2 for periods of 300 hours or more. The area specific cell resistance, corrected for fuel utilisation, ranged between 0.20 Ω cm2 and 0.34 Ω cm2 at 850 °C and 520 mV, and between 0.51 Ω cm2 and 0.92 Ω cm2 at 750 °C and 520 mV. The degradation of cell performance was found to be low (ranging from 0 to 8%/1,000 hours) at regular operating conditions. Voltage degradation rates of 20 to 40%/1,000 hours were observed under severe operating conditions, depending on the test conditions. Data analysis revealed a critical cell voltage of ca 750 mV, above which the degradation rates were trivial, but below which they were significant. Some cells were also tested using a different procedure to that usually applied at Risø. This gave a different aging behaviour, indicating that the detailed test circumstances may be decisive to the outcome.

    AB - The performance and degradation of Solid Oxide Fuel Cells (SOFC) were studied under severe operating conditions. The cells studied were manufactured in a small series by ECN, in the framework of the EU funded CORE-SOFC project. The cells were of the anode-supported type with a double layer LSM cathode. They were operated at 750 °C or 850 °C in hydrogen with 5% or 50% water at current densities ranging from 0.25 A cm–2 to 1 A cm–2 for periods of 300 hours or more. The area specific cell resistance, corrected for fuel utilisation, ranged between 0.20 Ω cm2 and 0.34 Ω cm2 at 850 °C and 520 mV, and between 0.51 Ω cm2 and 0.92 Ω cm2 at 750 °C and 520 mV. The degradation of cell performance was found to be low (ranging from 0 to 8%/1,000 hours) at regular operating conditions. Voltage degradation rates of 20 to 40%/1,000 hours were observed under severe operating conditions, depending on the test conditions. Data analysis revealed a critical cell voltage of ca 750 mV, above which the degradation rates were trivial, but below which they were significant. Some cells were also tested using a different procedure to that usually applied at Risø. This gave a different aging behaviour, indicating that the detailed test circumstances may be decisive to the outcome.

    KW - Brændselsceller og brint

    KW - Accelerated test

    KW - Anode

    KW - Cathode activation

    KW - Degradation

    KW - Impedance spectroscopy

    KW - SOFC

    U2 - 10.1002/fuce.200500112

    DO - 10.1002/fuce.200500112

    M3 - Conference article

    VL - 6

    SP - 130

    EP - 136

    JO - Fuel Cells

    JF - Fuel Cells

    SN - 1615-6846

    IS - 2

    ER -