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Effect of Excess Moisture on an Oxygen Reduction Reaction Mechanism in the Yttria Stabilized Zirconia and Strontium-Doped Lanthanum Manganite SOFC Composite Cathode

[+] Author Affiliations
John R. Izzo, Jr., Kyle N. Grew, Wilson K. S. Chiu

University of Connecticut, Storrs, CT

Paper No. FuelCell2009-85124, pp. 625-629; 5 pages
doi:10.1115/FuelCell2009-85124
From:
  • ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
  • Newport Beach, California, USA, June 8–10, 2009
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 978-0-7918-4881-4 | eISBN: 978-0-7918-3847-1
  • Copyright © 2009 by ASME

abstract

Air-Independent solid oxide fuel cell (SOFC) systems are primarily used in naval applications. In this study a decomposed hydrogen peroxide (H2 O2 ) stream is used as the oxidant. The fully decomposed diluted H2 O2 oxidant stream contains 20% O2 and 80% H2 O, and this water content is the basis for the studies performed. A computational model has been developed that couples local gas and charge transport with a detailed oxygen reduction mechanism and considers surface coverages in the presence of excess moisture. The model is used to study the detailed reaction mechanism and the performance of the cathode in the presence of a high water content oxidant stream.

Copyright © 2009 by ASME

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