Abstract
A previously published computational multi-phase model of a polymer-electrolyte membrane fuel cell has been extended in order to account for the anode side and the electrolyte membrane. The model has been applied to study the water balance of a fuel cell during operation under various humidification conditions. It was found that the specific surface area of the electrolyte in the catalyst layers close to the membrane is of critical importance for the overall water balance. Applying a high specific electrolyte surface area close to the membrane (a water-uptake layer) always leads to a lower net water transport coefficient. Thus we can reduce flooding at the cathode and may obtain improved cell performance due to a better humidified membrane. The results also suggest that membrane dehydration may occur at either anode or cathode depending on the net water transport.
Original language | English |
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Journal | ECS Transactions |
Volume | 33 |
Issue number | 1 |
Pages (from-to) | 1503-1513 |
Number of pages | 11 |
ISSN | 1938-6737 |
Publication status | Published - 2010 |
Event | 218th ECS Meeting - Las Vegas, United States Duration: 10 Oct 2010 → 15 Oct 2010 |
Conference
Conference | 218th ECS Meeting |
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Country/Territory | United States |
City | Las Vegas |
Period | 10/10/2010 → 15/10/2010 |