A hemispherical electrolyte probe for screening of solid oxide fuel cell cathode materials

Patrick K. Duffy, Scott A. Barnett, Thomas O Mason

Research output: Contribution to journalArticle

Abstract

A hemispherical electrolyte probe (HEP) technique has been adapted and introduced as a method to rapidly characterize potential cathode materials for solid oxide fuel cells. The technique was used to measure the linear-specific triple phase boundary (TPB) resistance of electronic conductors La0.8Sr0.2MnO3 (LSM) and (La0.87Ca0.13)0.95MnO3 (LCM), along with the area-specific surface resistance of mixed ionic/electronic conductors (MIECs) Sr0.5Sm0.5CoO3-δ (SSC), and La0.6Sr0.4Fe0.8Co0.2O3-δ (LSFC). These parameters are measures of the catalytic performance of the cathode materials, independent of the electrode geometry. HEP-measured linear-specific TPB resistance and surface resistance values are consistently lower by a factor of ∼3 compared with literature values for these materials, while activation energies are in fair agreement with the literature values. The technique could be useful for comparative rapid screening of candidate cathode materials. Alternatively, good estimates of linear-specific TPB resistance or area-specific surface resistance values can be obtained using a HEP probe that has been calibrated with a known standard.

Original languageEnglish
Pages (from-to)F802-F807
JournalJournal of the Electrochemical Society
Volume163
Issue number8
DOIs
Publication statusPublished - 2016

Fingerprint

cell cathodes
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Surface resistance
Electrolytes
Screening
Cathodes
Phase boundaries
screening
electrolytes
probes
cathodes
conductors
Activation energy
electronics
Electrodes
Geometry
activation energy
electrodes
estimates

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

A hemispherical electrolyte probe for screening of solid oxide fuel cell cathode materials. / Duffy, Patrick K.; Barnett, Scott A.; Mason, Thomas O.

In: Journal of the Electrochemical Society, Vol. 163, No. 8, 2016, p. F802-F807.

Research output: Contribution to journalArticle

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