Low-temperature solid-oxide fuel cells utilizing thin bilayer electrolytes

Tsepin Tsai*, Erica Perry, Scott Barnett

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

Abstract

Solid-oxide fuel cells (SOFCs) with electrolytes that provide high open-circuit voltage (OCV) and low ohmic loss down to 550°C are described. The electrolytes were bilayers consisting of a 4 to 8 μm thick Y-doped ceria (YDC) layer with a 1 to 1.5 μm thick Y-doped zirconia (YSZ) layer on the fuel side. The cathode/supports were La0.85Sr0.15MnO3-YSZ. The anodes consisted of thin YDC and Ni-YSZ layers. The YDC/YSZ electrolyte SOFCs yielded 85 to 98% of the theoretical OCV, compared with ≈50% for YDC electrolyte SOFCs. The cathode overpotential, which was a main factor limiting SOFC power density, was lower for YDC/YSZ than YSZ electrolytes. The maximum power density at 600°C, 210 mW/cm2, is higher than for previously reported SOFCs.

Original languageEnglish (US)
Pages (from-to)L130-L132
JournalJournal of the Electrochemical Society
Volume144
Issue number5
DOIs
StatePublished - May 1997

ASJC Scopus subject areas

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

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