Densification and Cell Performance of Gadolinium-Doped Ceria (GDC) Electrolyte/NiO-GDC Anode Laminates

A thin film (60 μm thick) of a gadolinium‐doped ceria (GDC) electrolyte was prepared by the doctor blade method. This film was laminated with freeze‐dried 42 vol% NiO–58 vol% GDC mixed powder and pressed uniaxially or isostatically under a pressure of 294 MPa. This laminate was cosintered at 1100 °–...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2009-01, Vol.92 (s1), p.S117-S121
Main Authors: Nagamori, Minako, Shimonosono, Taro, Sameshima, Soichiro, Hirata, Yoshihiro, Matsunaga, Naoki, Sakka, Yoshio
Format: Article
Language:English
Subjects:
Densification
Electrodes
Electrolytes
Ions
Semiconductor doping
Thin films
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Summary:A thin film (60 μm thick) of a gadolinium‐doped ceria (GDC) electrolyte was prepared by the doctor blade method. This film was laminated with freeze‐dried 42 vol% NiO–58 vol% GDC mixed powder and pressed uniaxially or isostatically under a pressure of 294 MPa. This laminate was cosintered at 1100 °–1500 °C in air for 4–12 h. The laminate warped because of the difference in the shrinkage of the electrolyte and electrode during the sintering. A higher shrinkage was measured for the electrode at 1100 °–1200 °C and for the electrolyte at 1300 °–1500 °C. The increase of the thickness of anode was effective in decreasing the warp and in increasing the density of the laminated composite. The maximum electric power density with a SrRuO3 cathode using 3 vol% H2O‐containing H2 fuel was 100 mW/cm2 at 600 °C and 380 mW/cm2 at 800 °C, respectively, for the anode‐supported GDC electrolyte with 30 μm thickness.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2008.02646.x