Chapter 15. Modeling of MIEC Cathodes: The Effect of Sheet Resistance

  1. Narottam P. Bansal,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. David S. Mebane,
  2. Erik Koep and
  3. Meilin Liu

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291337.ch15

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

How to Cite

Mebane, D. S., Koep, E. and Liu, M. (2006) Modeling of MIEC Cathodes: The Effect of Sheet Resistance, in Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4 (eds N. P. Bansal, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291337.ch15

Author Information

  1. School of Materials Science and Engineering, Georgia Institute of Technology 771 Ferst Dr. NW Atlanta, GA 30332-0245

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080542

Online ISBN: 9780470291337

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Keywords:

  • electrode;
  • hypothesis;
  • parameters;
  • electrochemical;
  • equilibrium

Summary

The critical behavior of electrode polarization resistance versus feature height for patterned MIEC cathodes of constant surface area and TPB length suggests a competition between bulk ionic resistance and electronic resistance. A model taking both effects into account is derived and applied to a two-dimensional reduction of the problem. Testing the model using parameters that are realistic for an LSM-YSZ system reveals that the model structure does, in fact, replicate the critical behavior. This lends credence to the hypothesis of electronic-ionic competition as the source for this behavior, and provides a basis for further quantitative investigation of the oxygen reduction process using patterned electrodes.