Increased solid-oxide fuel cell power density using interfacial ceria layers

Tsepin Tsai, Scott A. Barnett*

*Corresponding author for this work

Research output: Contribution to journalArticle

138 Scopus citations

Abstract

Solid-oxide fuel cell power densities typically drop rapidly as the operating temperature is decreased, due to electrolyte ohmic losses and/or electrode overpotentials. In this paper, we describe fuel cells utilizing 8 μm thick yttria-stabilized zirconia (YSZ) electrolytes to provide low ohmic loss. Adding thin porous yttria doped ceria (YDC) layers on either side of the YSZ yielded much-reduced interfacial resistances at both the LSM cathodes and Ni-YSZ anodes. The cells provide higher power densities than previously reported below 700°C, e.g. 300 and 480 mW cm-2 at 600 and 650°C, respectively (measured in 97%H2 + 3%H2O and air), and also provide high power densities at higher temperatures, e.g. 760 mW cm-2 at 750°C.

Original languageEnglish (US)
Pages (from-to)191-196
Number of pages6
JournalSolid State Ionics
Volume98
Issue number3-4
DOIs
StatePublished - Jun 2 1997

Keywords

  • Cathode
  • Fuel cell
  • Yttria-doped ceria

ASJC Scopus subject areas

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

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