Fabrication and characterization of micro-tubular cathode-supported SOFC for intermediate temperature operation

Yu Liu, Shin Ichi Hashimoto, Hanako Nishino, Katsuhito Takei, Masashi Mori, Toshio Suzuki, Yoshihiro Funahashi

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

We report the fabrication and characterization of a micro-tubular cathode-supported cell consisting of a Ce0.9Gd0.1O1.95 electrolyte with a Ni-cermet anode on a porous La0.6Sr0.4Co0.2Fe0.8O3-δ/Ce0.9Gd0.1O1.95 (60:40 volume) tube (460 μm wall thickness and 2.26 mm diameter). The cells were fabricated by a cost-effective technique involving extrusion molding and slurry coating through a co-firing process. Densification of the ceria film (thickness < 15 μm) was successful by co-firing the laminated electrolyte with the porous cathode at 1200 °C. NiO-Ce0.9Gd0.1O1.95 (Ni: Ce0.9Gd0.1O1.95 = 50:50 in volume after reduction) was subsequently sintered on the electrolyte at 1100 °C to construct a 10 μm thick, porous and well-adherent anode. The cell having 1.5 cm tube length fed with humidified 30 vol.% H2-Ar (3% H2O) yielded the maximum power densities of 0.16, 0.13 and 0.11 W cm-2, at 600, 550 and 500 °C, respectively. It was found that the cell performance is strongly dominated by the tube length, due to a high substrate resistance from the cathode current collections.

Original languageEnglish
Pages (from-to)95-102
Number of pages8
JournalJournal of Power Sources
Volume174
Issue number1
DOIs
Publication statusPublished - 2007 Nov 22

Keywords

  • Cathode-supported SOFC
  • Co-firing
  • Gadolinium-doped ceria oxide
  • LaSrCoFeO
  • 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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