Performance Improvement of an Inhomogeneous Cathode by Infiltration

S. V. Seyed-Vakili, Christopher R. Graves, A. Babaei, S. Heshmati-Manesh, Mogens Bjerg Mogensen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The performance of solid oxide fuel cells (SOFCs) is considerably influenced by the microstructure and chemical composition of cathode materials. Porous La0.85Sr0.15FeO3
Ce0.9Gd0.1O2 composite electrodes were infiltrated by La0.6Sr0.4CoO3 and La0.6Sr0.4FeO3. The effects of infiltration loading, calcination temperature of infiltrated material and
co-infiltration of LSC and LSF were investigated using electrochemical impedance measurement, microstructural analysis, and high-temperature X-ray diffraction (HT-XRD). A
symmetrical cell two-electrode configuration was used to examine the electrochemical performance of the electrodes. The electrochemical results revealed that the polarization
resistance of the cathodes significantly was decreased by infiltration from 2.59 to 0.034 Ω cm2 measured at 670 °C. The best electrode performance was achieved at a calcination
temperature of 770 °C. It was also found that infiltration of LSC improved the stability of the electrodes during 145 h of testing at 620 °C in air at open circuit voltage (OCV).
Original languageEnglish
JournalFuel Cells
Volume17
Issue number1
Pages (from-to)108-114
ISSN1615-6846
DOIs
Publication statusPublished - 2017

Keywords

  • Cathode
  • Infiltration
  • LSC
  • LSF
  • Nanoparticle Impregnation
  • SOFC

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