Simple infiltrated microstructure polarization loss estimation (SIMPLE) model predictions of today and tomorrow's nano-composite SOFC cathodes

    Research output: ResearchConference contribution

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    Abstract

    The Simple Infiltrated Polarization Loss Estimation (SIMPLE) model was used to predict the performance of a variety of mixed ionic electron conductor (MIEC) - ion conductor (IC) Solid Oxide Fuel Cell (SOFC) nano-composite cathodes. These predictions agree with the reported values to within 70% or better (without the use of fitting parameters) at all temperatures. Systematic SIMPLE model variation of typical nano-composite cathode geometrical parameters reveals little change in cathode performance with cathode thickness and/or porosity above a critical cathode thickness. Further, SIMPLE modeling suggests that conventionally structured nano-composite cathodes with MIEC surface resistances 10 times lower than Sm 0.5Sr 0.5CoO 3-x (SSC) and ionic conductivities 10 times higher than Ce 0.9Gd 0.1O 1.95 (GDC) could achieve polarization resistances of 0.1 Ωcm 2 at ∼450°C. Likewise, conventionally structured cathodes with 100 times and 1000 times better materials than SSC and GDC could achieve polarization resistances of 0.1 Ωcm 2 at ∼375°C, and ∼300°C, respectively.

    LanguageEnglish (US)
    Title of host publicationECS Transactions
    Pages2321-2329
    Number of pages9
    Volume35
    Edition3 PART 3
    DOIs
    StatePublished - 2011
    Event12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada
    Duration: May 1 2011May 6 2011

    Other

    Other12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
    CountryCanada
    CityMontreal, QC
    Period5/1/115/6/11

    Profile

    Solid oxide fuel cells (SOFC)
    Cathodes
    Polarization
    Microstructure
    Composite materials
    Electrons
    Surface resistance
    Ionic conductivity
    Porosity
    Ions
    Temperature

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Simple infiltrated microstructure polarization loss estimation (SIMPLE) model predictions of today and tomorrow's nano-composite SOFC cathodes. / Wang, Lin; Nicholas, Jason D.

    ECS Transactions. Vol. 35 3 PART 3. ed. 2011. p. 2321-2329.

    Research output: ResearchConference contribution

    Wang, L & Nicholas, JD 2011, Simple infiltrated microstructure polarization loss estimation (SIMPLE) model predictions of today and tomorrow's nano-composite SOFC cathodes. in ECS Transactions. 3 PART 3 edn, vol. 35, pp. 2321-2329, 12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting, Montreal, QC, Canada, 5/1/11. DOI: 10.1149/1.3570228
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    abstract = "The Simple Infiltrated Polarization Loss Estimation (SIMPLE) model was used to predict the performance of a variety of mixed ionic electron conductor (MIEC) - ion conductor (IC) Solid Oxide Fuel Cell (SOFC) nano-composite cathodes. These predictions agree with the reported values to within 70% or better (without the use of fitting parameters) at all temperatures. Systematic SIMPLE model variation of typical nano-composite cathode geometrical parameters reveals little change in cathode performance with cathode thickness and/or porosity above a critical cathode thickness. Further, SIMPLE modeling suggests that conventionally structured nano-composite cathodes with MIEC surface resistances 10 times lower than Sm 0.5Sr 0.5CoO 3-x (SSC) and ionic conductivities 10 times higher than Ce 0.9Gd 0.1O 1.95 (GDC) could achieve polarization resistances of 0.1 Ωcm 2 at ∼450°C. Likewise, conventionally structured cathodes with 100 times and 1000 times better materials than SSC and GDC could achieve polarization resistances of 0.1 Ωcm 2 at ∼375°C, and ∼300°C, respectively.",
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