Improving La0.6Sr0.4Co0.8Fe0.2O3-δ infiltrated solid oxide fuel cell cathode performance through precursor solution desiccation

Theodore E. Burye, Jason D. Nicholas

    Research output: Contribution to journalArticle

    • 13 Citations

    Abstract

    Here, for the first time, the average size of solid oxide fuel cell (SOFC) electrode nano-particles was reduced through the chemical desiccation of infiltrated precursor nitrate solutions. Specifically, after firing at 700 °C, CaCl2-desiccated La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) - Ce0.9Gd0.1O1.95 (GDC) cathodes contained LSCF infiltrate particles with an average size of 22 nm. This is in contrast to comparable, undesiccated LSCF-GDC cathodes which contained LSCF infiltrate particles with an average size of 48 nm. X-ray diffraction, scanning electron microscopy, and controlled atmosphere electrochemical impedance spectroscopy revealed that desiccation reduced the average infiltrate particle size without altering the infiltrate phase purity, the cathode concentration polarization resistance, or the cathode electronic resistance. Compared to undesiccated LSCF-GDC cathodes achieving polarization resistances of 0.10 Ωcm2 at 640 °C, comparable CaCl2-dessicated LSCF-GDC cathodes achieved 0.10 Ωcm2 at 575 °C. Mathematical modeling suggested that these performance improvements resulted solely from average infiltrate particle size reductions.

    Original languageEnglish (US)
    Pages (from-to)54-61
    Number of pages8
    JournalJournal of Power Sources
    Volume276
    DOIs
    StatePublished - Feb 15 2015

    Profile

    cathodes
    Cathodes
    Coumestrol
    drying
    solid oxide fuel cells
    polarization
    Solid oxide fuel cells (SOFC)
    Particle size
    Polarization
    Pacific Islands
    cell cathodes
    controlled atmospheres
    nitrates
    purity
    impedance
    scanning electron microscopy
    electrodes
    electronics
    diffraction
    spectroscopy

    Keywords

    • Composite electrode
    • Desiccation
    • Infiltration
    • Nano-particle
    • Solid oxide fuel cell

    ASJC Scopus subject areas

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

    Cite this

    @article{11433bd9f5de40e3aaa828d22cdbe8e9,
    title = "Improving La0.6Sr0.4Co0.8Fe0.2O3-δ infiltrated solid oxide fuel cell cathode performance through precursor solution desiccation",
    abstract = "Here, for the first time, the average size of solid oxide fuel cell (SOFC) electrode nano-particles was reduced through the chemical desiccation of infiltrated precursor nitrate solutions. Specifically, after firing at 700 °C, CaCl2-desiccated La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) - Ce0.9Gd0.1O1.95 (GDC) cathodes contained LSCF infiltrate particles with an average size of 22 nm. This is in contrast to comparable, undesiccated LSCF-GDC cathodes which contained LSCF infiltrate particles with an average size of 48 nm. X-ray diffraction, scanning electron microscopy, and controlled atmosphere electrochemical impedance spectroscopy revealed that desiccation reduced the average infiltrate particle size without altering the infiltrate phase purity, the cathode concentration polarization resistance, or the cathode electronic resistance. Compared to undesiccated LSCF-GDC cathodes achieving polarization resistances of 0.10 Ωcm2 at 640 °C, comparable CaCl2-dessicated LSCF-GDC cathodes achieved 0.10 Ωcm2 at 575 °C. Mathematical modeling suggested that these performance improvements resulted solely from average infiltrate particle size reductions.",
    keywords = "Composite electrode, Desiccation, Infiltration, Nano-particle, Solid oxide fuel cell",
    author = "Burye, {Theodore E.} and Nicholas, {Jason D.}",
    year = "2015",
    month = "2",
    doi = "10.1016/j.jpowsour.2014.11.082",
    volume = "276",
    pages = "54--61",
    journal = "Journal of Power Sources",
    issn = "0378-7753",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - Improving La0.6Sr0.4Co0.8Fe0.2O3-δ infiltrated solid oxide fuel cell cathode performance through precursor solution desiccation

    AU - Burye,Theodore E.

    AU - Nicholas,Jason D.

    PY - 2015/2/15

    Y1 - 2015/2/15

    N2 - Here, for the first time, the average size of solid oxide fuel cell (SOFC) electrode nano-particles was reduced through the chemical desiccation of infiltrated precursor nitrate solutions. Specifically, after firing at 700 °C, CaCl2-desiccated La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) - Ce0.9Gd0.1O1.95 (GDC) cathodes contained LSCF infiltrate particles with an average size of 22 nm. This is in contrast to comparable, undesiccated LSCF-GDC cathodes which contained LSCF infiltrate particles with an average size of 48 nm. X-ray diffraction, scanning electron microscopy, and controlled atmosphere electrochemical impedance spectroscopy revealed that desiccation reduced the average infiltrate particle size without altering the infiltrate phase purity, the cathode concentration polarization resistance, or the cathode electronic resistance. Compared to undesiccated LSCF-GDC cathodes achieving polarization resistances of 0.10 Ωcm2 at 640 °C, comparable CaCl2-dessicated LSCF-GDC cathodes achieved 0.10 Ωcm2 at 575 °C. Mathematical modeling suggested that these performance improvements resulted solely from average infiltrate particle size reductions.

    AB - Here, for the first time, the average size of solid oxide fuel cell (SOFC) electrode nano-particles was reduced through the chemical desiccation of infiltrated precursor nitrate solutions. Specifically, after firing at 700 °C, CaCl2-desiccated La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) - Ce0.9Gd0.1O1.95 (GDC) cathodes contained LSCF infiltrate particles with an average size of 22 nm. This is in contrast to comparable, undesiccated LSCF-GDC cathodes which contained LSCF infiltrate particles with an average size of 48 nm. X-ray diffraction, scanning electron microscopy, and controlled atmosphere electrochemical impedance spectroscopy revealed that desiccation reduced the average infiltrate particle size without altering the infiltrate phase purity, the cathode concentration polarization resistance, or the cathode electronic resistance. Compared to undesiccated LSCF-GDC cathodes achieving polarization resistances of 0.10 Ωcm2 at 640 °C, comparable CaCl2-dessicated LSCF-GDC cathodes achieved 0.10 Ωcm2 at 575 °C. Mathematical modeling suggested that these performance improvements resulted solely from average infiltrate particle size reductions.

    KW - Composite electrode

    KW - Desiccation

    KW - Infiltration

    KW - Nano-particle

    KW - Solid oxide fuel cell

    UR - http://www.scopus.com/inward/record.url?scp=84912567275&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84912567275&partnerID=8YFLogxK

    U2 - 10.1016/j.jpowsour.2014.11.082

    DO - 10.1016/j.jpowsour.2014.11.082

    M3 - Article

    VL - 276

    SP - 54

    EP - 61

    JO - Journal of Power Sources

    T2 - Journal of Power Sources

    JF - Journal of Power Sources

    SN - 0378-7753

    ER -