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Title: Communication — Modeling polymer-electrolyte fuel-cell agglomerates with double-trap kinetics

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0111711jes· OSTI ID:1379626
 [1];  [1]
  1. 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
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (5)

Modeling Air Electrodes with Low Platinum Loading journal January 2019
Through-the-Membrane Transient Phenomena in PEM Fuel Cells: A Modeling Study journal January 2019
The Butler-Volmer Equation for Polymer Electrolyte Membrane Fuel Cell (PEMFC) Electrode Kinetics: A Critical Discussion journal January 2019
A Comparison of Models for Transport Resistance in Fuel-Cell Catalyst Layers journal January 2018
A Hierarchical Model for Oxygen Transport in Agglomerates in the Cathode Catalyst Layer of a Polymer-Electrolyte Fuel Cell journal January 2018