Communication — Modeling polymer-electrolyte fuel-cell agglomerates with double-trap kinetics
Journal Article
·
· Journal of the Electrochemical Society
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
A new semi-analytical agglomerate model is presented for polymer-electrolyte fuel-cell cathodes. The model uses double-trap kinetics for the oxygen-reduction reaction, which can capture the observed potential-dependent coverage and Tafel-slope changes. An iterative semi-analytical approach is used to obtain reaction rate constants from the double-trap kinetics, oxygen concentration at the agglomerate surface, and overall agglomerate reaction rate. The analytical method can predict reaction rates within 2% of the numerically simulated values for a wide range of oxygen concentrations, overpotentials, and agglomerate sizes, while saving simulation time compared to a fully numerical approach.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Hydrogen Fuel Cell Technologies Office
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1379626
- Journal Information:
- Journal of the Electrochemical Society, Vol. 164, Issue 11; ISSN 0013-4651
- Publisher:
- The Electrochemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 13 works
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