Cited by 581Fuel Cells and Related MaterialsElectrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel Cells

Modeling and Experimental Diagnostics in Polymer Electrolyte Fuel Cells

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Springer, T. E., Wilson, M. S., Gottesfeld, S.·1993·Journal of The Electrochemical Society

Abstract

This paper presents a fit between model and experiment for well‐humidified polymer electrolyte fuel cells operated to maximum current density with a range of cathode gas compositions. The model considers, in detail, losses caused by: ( i ) interfacial kinetics at the Pt/ionomer interface, ( ii ) gas‐transport and ionic‐conductivity limitations in the catalyst layer, and ( iii ) gas‐transport limitations in the cathode backing. Our experimental data were collected with cells that utilized thin‐film catalyst layers bonded directly to the membrane, and a separate catalyst‐free hydrophobic backing layer. This structure allows a clearer resolution of the processes taking place in each of these distinguishable parts of the cathode. In our final comparison of model predictions with the experimental data, we stress the simultaneous fit of a family of complete polarization curves obtained for gas compositions ranging from 5 atm to a mixture of 5% in , employing in each case the same model parameters for interfacial kinetics, catalyst‐layer transport, and backing‐layer transport. This approach allowed us to evaluate losses in the cathode backing and in the cathode catalyst layer, and thus identify the improvements required to enhance the performance of air cathodes in polymer electrolyte fuel cells. Finally, we show that effects of graded depletion in oxygen along the gas flow channel can be accurately modeled using a uniform effective oxygen concentration in the flow channel, equal to the average of inlet and exit concentrations. This approach has enabled simplified and accurate consideration of oxygen utilization effects.

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Crossref · 10.1149/1.2221120

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Authors
Springer, T. E., Wilson, M. S., & Gottesfeld, S.
Affiliations
Los Alamos National Laboratory (US)
Venue
Journal of The Electrochemical Society
Published
1993-12-01
Volume
140
Issue
12
Pages
3513-3526
ISSN
  • 0013-4651 (ISSN-L)
  • 1945-7111
OpenAlex
W2064503430
Cited by
581
References
0
Citations by year
2026: 4 · 2025: 7 · 2024: 8 · 2023: 3 · 2022: 11 · 2021: 10 · 2020: 14 · 2019: 9 · 2018: 9 · 2017: 18 · 2016: 15 · 2015: 6 · 2014: 12 · 2013: 12 · 2012: 19
FWCI
3.96
Type
journal article
Language
en
Open access
Locations
Journal of The Electrochemical Society (publishedVersion)
Funders
  • U.S. Department of Energy
  • Los Alamos National Laboratory
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
Keywords
proton exchange membrane fuel cells, polarization curves, interfacial kinetics, ionic conductivity, oxygen depletion, oxygen utilization, model-experiment comparison, air cathode

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