17. Development and Characterization of SOFC NI-YSZ Anodes Using Highly Porous NI Foam

  1. Narottam P. Bansal
  1. S. F. Corbin1,
  2. R. M. Clemmer1 and
  3. Q. Yang2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch17

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

How to Cite

Corbin, S. F., Clemmer, R. M. and Yang, Q. (2008) Development and Characterization of SOFC NI-YSZ Anodes Using Highly Porous NI Foam, in Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4 (ed N. P. Bansal), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291245.ch17

Author Information

  1. 1

    Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

  2. 2

    INCO Technical Services Ltd., 2060 Flavelle Blvd., Mississauga, Ontario, Canada

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982343

Online ISBN: 9780470291245

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Keywords:

  • catalytic;
  • solids;
  • microstructural;
  • zirconia;
  • microstructure

Summary

Porous Ni-yittria stabilized zirconia (YSZ) composites are the most common materials being used for solid oxide fuel cell (SOFC) anodes. In this application, anode electrical conductivity should be maximized for electrochemical performance while the coefficient of thermal expansion (CTE) should match that of the pure YSZ electrolyte in order to minimize thermal mismatch and therefore increase reliability. Unfortunately in conventional anode fabrication, percolation of the Ni phase to create acceptable conductivity requires relatively high Ni contents (i. e. > 35 vol% of solids) which increases CTE mismatch with the YSZ electrolyte. In this study, the incorporation of highly porous Ni foam into an anode structure was investigated in order to produce high conductivity values at low Ni volumes. This was done by developing techniques for pasting various YSZ based slurries into a Ni foam structure followed by sintering. The electrical conductivity and CTE of these structures was measured as a function of Ni, YSZ and porous volume. Sintered anodes made with Ni-foam exhibited a superior combination of conductivity and CTE compared to conventional anode structures.