| Autor: |
Jeyammuangpak, Apidsada, Orncompa, Peerapat, Saikasem, Sahussawat, Nantasaksiri, Kotchakarn, Charoen-Amornkitt, Patcharawat, Suzuki, Takahiro, Tsushima, Shohji |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3086 Issue 1, p1-7, 7p |
| Abstrakt: |
Polymer electrolyte fuel cells (PEFC) are one of the most promising electrochemical energy devices for portable applications as they can convert chemical energy to electrical energy with high efficiency, provide large power density, and have low operating temperatures and pressures. Compared to widely accepted technology like lithium-ion batteries, PEFCs use fewer critical raw materials. Therefore, they can serve as an alternative to ease the scarcity of materials in the future. Improved PEFC performance is necessary for widespread commercialization. Previous studies kept homogeneity of the electrodes as a primary importance. However, recent studies on perforations in the electrodes have shown that perforations can positively or negatively affect cell performance depending on the operating conditions. The challenge is understanding the impact of cracks on transport phenomena in the electrodes. In this study, a model to investigate the mass and liquid water transport in porous media with the presence of microcracks was proposed. A 2D half-cell model was developed in FreeFEM++ software to investigate the effects of crack position, number, and depth. The results revealed that, based on the considered condition, under-channel cracks could significantly enhance cell performance by 7%, while the under-rib crack did not provide any significant benefits. The results of this study will provide a fundamental understanding of improving the efficiency of PEFCs by intentionally creating cracks in the electrodes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
