Measurements and modeling of Sm0.5 Sr0.5 CoO 3-x - Ce0.9 Gd0.1 O1.95 SOFC cathodes produced using infiltrate solution additives

Jason D. Nicholas, Scott A. Barnett

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Abstract

Nanocomposite Sm0.5 Sr0.5 CoO3-x (SSC)- Ce0.9 Gd0.1 O1.95 (GDC) solid oxide fuel cell (SOFC) cathodes were produced by infiltrating SSC nitrate solutions into GDC scaffolds. A single infiltration of a concentrated solution resulted in a low polarization resistance of 0.1 cm2 at 600°C. Infiltrate solution additives slightly improved the SSC phase purity but did not significantly alter the SSC particle morphology/size or the infiltrated cathode polarization resistance. Polarization resistance predictions made using microstructural observations and a simple model were found to be within 35% of the experimentally measured values without the use of fitting parameters.

LanguageEnglish (US)
JournalJournal of the Electrochemical Society
Volume157
Issue number4
DOIs
StatePublished - 2010

Profile

cell cathodes
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Cathodes
Polarization
polarization
infiltration
Infiltration
Scaffolds
Nitrates
nitrates
Nanocomposites
nanocomposites
purity
cathodes
predictions

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

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abstract = "Nanocomposite Sm0.5 Sr0.5 CoO3-x (SSC)- Ce0.9 Gd0.1 O1.95 (GDC) solid oxide fuel cell (SOFC) cathodes were produced by infiltrating SSC nitrate solutions into GDC scaffolds. A single infiltration of a concentrated solution resulted in a low polarization resistance of 0.1 cm2 at 600°C. Infiltrate solution additives slightly improved the SSC phase purity but did not significantly alter the SSC particle morphology/size or the infiltrated cathode polarization resistance. Polarization resistance predictions made using microstructural observations and a simple model were found to be within 35{\%} of the experimentally measured values without the use of fitting parameters.",
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AB - Nanocomposite Sm0.5 Sr0.5 CoO3-x (SSC)- Ce0.9 Gd0.1 O1.95 (GDC) solid oxide fuel cell (SOFC) cathodes were produced by infiltrating SSC nitrate solutions into GDC scaffolds. A single infiltration of a concentrated solution resulted in a low polarization resistance of 0.1 cm2 at 600°C. Infiltrate solution additives slightly improved the SSC phase purity but did not significantly alter the SSC particle morphology/size or the infiltrated cathode polarization resistance. Polarization resistance predictions made using microstructural observations and a simple model were found to be within 35% of the experimentally measured values without the use of fitting parameters.

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