Chapter 4. Influence of Anode Thickness on the Electrochemical Performance of Single Chamber Solid Oxide Fuel Cells

  1. Narottam P. Bansal,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. B. E. Buergler,
  2. Y. Santschi,
  3. M. Felberbaum and
  4. L. J. Gauckler

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291337.ch4

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

Buergler, B. E., Santschi, Y., Felberbaum, M. and Gauckler, L. J. (2006) Influence of Anode Thickness on the Electrochemical Performance of Single Chamber Solid Oxide Fuel Cells, 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.ch4

Author Information

  1. Department Materials, ETH Zurich 8093 Zurich, Switzerland

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:

  • cathode;
  • electrolyte;
  • configuration;
  • microscope;
  • thermocouple

Summary

The influence of the anode thickness (9–60 μm) on the behaviour of SC-SOFCs was investigated in different total flows of a methane-air mixture to the anode. In order to eliminate the effects of the cathode with varying flow, a double chamber setup with separated fuel and air streams to the anode and cathode was used. The open circuit voltage (OCV) decreased with increasing gas flow and at the same time the power density increased. Oscillations of the OCV at high gas flows were observed for cells with thin anodes. Cells with thick anodes showed the highest OCV and the highest maximum power density. These anodes have a higher catalytic activity for the partial oxidation of methane and create a lower oxygen partial pressure at the anode/electrolyte interface. They also provide more hydrogen than thin anodes and can give a higher power output.