Structural, chemical, and electrochemical characteristics of LaSr 2Fe 2CrO 9-δ-based solid oxide fuel cell anodes

Jacob M. Haag, David M. Bierschenk, Scott A. Barnett, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Solid oxide fuel cells with LaSr 2Fe 2CrO 9-δ-Gd 0.1Ce 0.9O 2-δ composite anodes were tested in H 2, H 2S-contaminated H 2, and CH 4 fuels as well as under redox cycling conditions. The La 0.9Sr 0.1Ga 0.8Mg 0.2O 3-δ electrolyte supported cells had La 0.4Ce 0.6O 2-δ barrier layers to prevent cation diffusion between LaSr 2Fe 2CrO 9-δ and La 0.9Sr 0.1Ga 0.8Mg 0.2O 3-δ. After an initial break-in where the performance improved slightly, the cells were stable in humidified H 2 with a power density > 0.4 W cm - 2 and an anode polarization resistance as low as 0.22 Ω cm 2. Anode polarization resistance showed little or no change after 15 redox cycles at 800 °C. Cell performance was stable with 22 ppm H 2S, with only a slight performance decrease relative to pure H 2, but higher H 2S concentrations caused continuous degradation. Also, the performance in humidified CH 4 fuel was quite low.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalSolid State Ionics
Volume212
DOIs
Publication statusPublished - Mar 29 2012

Fingerprint

cell anodes
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Anodes
anodes
Polarization
cells
methylidyne
Electrolytes
cycles
Cations
polarization
barrier layers
Positive ions
radiant flux density
Degradation
Composite materials
electrolytes
degradation
cations

Keywords

  • Oxide anode
  • Perovskite
  • Redox
  • Solid oxide fuel cell
  • Sulfur tolerance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Chemistry(all)

Cite this

Structural, chemical, and electrochemical characteristics of LaSr 2Fe 2CrO 9-δ-based solid oxide fuel cell anodes. / Haag, Jacob M.; Bierschenk, David M.; Barnett, Scott A.; Poeppelmeier, Kenneth R.

In: Solid State Ionics, Vol. 212, 29.03.2012, p. 1-5.

Research output: Contribution to journalArticle

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