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In Situ Calorimetric Measurements in a Polymer Electrolyte Fuel Cell

[+] Author Affiliations
Steffen Mo̸ller-Holst

SINTEF, Trondheim, Norway

Signe Kjelstrup

Norwegian University of Science and Technology, Trondheim, Norway

Preben J. S. Vie

Institute for Energy Technology, Kjeller, Norway

Paper No. FUELCELL2006-97229, pp. 373-379; 7 pages
doi:10.1115/FUELCELL2006-97229
From:
  • ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2006 Fourth International Conference on Fuel Cell Science, Engineering and Technology, Parts A and B
  • Irvine, California, USA, June 19–21, 2006
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4247-9 | eISBN: 0-7918-3780-7
  • Copyright © 2006 by ASME

abstract

We present calorimetric measurements on a single isothermal polymer electrolyte fuel cell, operated on dry hydrogen and oxygen at 50 °C. The measured heat production of the complete cell was decomposed into ohmic and non-ohmic heat effects. The results predicted the thermo-neutral potential of the cell within 7% error. The part of the heat production that originated mainly from the cathode overpotential, was analyzed in terms of standard overpotential theory, giving an exchange current density of the bulk cathode overpotential of 6×10−4 A/cm2 and a transfer factor of 0.27. (The cathode catalyst surface area was not determined.) This is the first time an overpotential of an electrode has been determined from its heat production.

Copyright © 2006 by ASME

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