Anode-supported thin-film fuel cells operated in a single chamber configuration 2T-I-12

Zongping Shao, Chan Kwak, Sossina M. Haile*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

83 Scopus citations

Abstract

The performance characteristics of anode-supported, thin-film, single chamber fuel cells (SCFCs) have been investigated. Cells, in which Ni+Sm 0.15Ce0.85O2 (Samaria doped ceria, SDC) served as the anode and SDC as the electrolyte, were fabricated by dry pressing. High quality, bilayer structures with electrolyte thicknesses as small as 10 μm were prepared with excellent reproducibility. The cathode, 70 wt.% Sm 0.5Sr0.5CoO3+30% SDC, was deposited by a spray method. The cells were operated in a dilute propane+oxygen mixture. The influence of environmental temperature, gas composition and flow rate on the fuel cell performance were investigated. At low temperatures, fuel cell power output was limited primarily by poor catalytic activity at the anode whereas at high temperatures it was limited primarily by high catalytic activity of the cathode towards propane oxidation. Thus, intermediate temperatures are optimal for maximizing power densities. An increase in fuel flow rate led to an increase of the fuel cell temperature due to exothermal partial oxidation on the anode, producing a complex response in fuel cell power output. Under optimized gas compositions and flow conditions, a peak power density of ∼210 mW/cm2 was obtained.

Original languageEnglish (US)
Pages (from-to)39-46
Number of pages8
JournalSolid State Ionics
Volume175
Issue number1-4
DOIs
StatePublished - Nov 30 2004
EventFourteenth International Conference on Solid State Ionics - Monterey, CA., United States
Duration: Jun 22 2003Jun 27 2003

Keywords

  • Anode-supported fuel cell
  • Samaria doped ceria (SDC)
  • Single chamber fuel cell (SCFC)
  • Sm SrCoO (SSC)

ASJC Scopus subject areas

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

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