Short-period segmented-in-series solid oxide fuel cells on flattened tube supports

Manoj R. Pillai, Dan Gostovic, Ilwon Kim, Scott A Barnett*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Segmented-in-series solid oxide fuel cells (SIS-SOFCs) were prepared on flattened-tube partially stabilized zirconia supports. The distinguishing characteristic of these cells was the short repeat period, 2.4 mm, and small active cell length, 1.3 mm, compared to ≈10 mm in previous SIS-SOFCs. The support tubes, formed by gelcasting, were bisque fired and then screen printing was used to sequentially deposit Ni-YSZ anodes, YSZ electrolytes, and Pt-YSZ composite interconnects. After high-temperature co-firing, LSM-YSZ and LSM cathode layers were screen printed and fired. Each flattened tube side had 12-16 individual cells. For testing, the open tube ends were sealed and humidified hydrogen flowed inside of the tubes; air was flowed over the outside of the tubes. Maximum total power at 800 °C was ≈8 W and maximum power density was ≈0.7 W cm-2, calculated using cell active area. Good stability was observed during a ≈650 h steady-state test. Excellent stability was also observed over ≈20 redox cycles.

Original languageEnglish (US)
Pages (from-to)960-965
Number of pages6
JournalJournal of Power Sources
Volume163
Issue number2
DOIs
StatePublished - Jan 1 2007

Keywords

  • Gelcasting
  • Multi-cell stack
  • Redox cycling
  • Screen printing
  • Segmented-in-series
  • Solid oxide fuel cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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