Fabrication and electrochemical properties of SOFC single cells using porous yttria-stabilized zirconia ceramic support layer coated with Ni

A porous yttria-stabilized zirconia (YSZ) ceramic supported single cell with a configuration of porous YSZ support layer coated with Ni/Ni–Ce0.8Sm0.2O1.9 (SDC) anode/YSZ/SDC bi-layer electrolyte/La0.6Sr0.4Co0.2Fe0.8O3−δ cathode was fabricated. The porosity, mechanical strength, and microstructure of...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2014-07, Vol.34 (7), p.1771-1776
Main Authors: Lee, Myong-Jin, Jung, Jae-Hak, Zhao, Kai, Kim, Bok-Hee, Xu, Qing, Ahn, Byung-Guk, Kim, Spencer Seung-Hyun, Kim, Sung-Youl
Format: Article
Language:English
Subjects:
Porosity
Porous YSZ support layer
Single cell
Spin coating
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Summary:A porous yttria-stabilized zirconia (YSZ) ceramic supported single cell with a configuration of porous YSZ support layer coated with Ni/Ni–Ce0.8Sm0.2O1.9 (SDC) anode/YSZ/SDC bi-layer electrolyte/La0.6Sr0.4Co0.2Fe0.8O3−δ cathode was fabricated. The porosity, mechanical strength, and microstructure of porous YSZ ceramics were investigated with respect to the amount of poly(methyl methacrylate) (PMMA) used as a pore former. Porous YSZ ceramics with 56vol.% PMMA showed a mechanical strength of 24±3MPa and a porosity of 37±1%. The electrochemical properties of the single cell employing the porous YSZ support layer were measured using hydrogen and methane fuels, respectively. The single cell exhibited maximum power densities of 421mW/cm2 in hydrogen and 399mW/cm2 in methane at 800°C. Moreover, at a current density of 550mA/cm2, the cell maintained 91% of its initial voltage after operation in methane for 13h at 700°C.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2013.12.042