Rayhani, Mahsheed et Jian, Cuiying.
2025.
« Mechanistic understanding of the effects of graphene oxide on the thermal conductivity of polymer fuel cells ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
Efficient thermal management is critical for the performance and durability of polymer electrolyte membrane fuel cells (PEMFCs), particularly under dry and high-temperature conditions. This study examines the impact of graphene oxide (GO) incorporation on the thermal conductivity (TC) of Nafion membranes using molecular dynamics (MD) simulations. To this end, the TC of 0.8 wt% GO-loaded Nafion membrane was compared with cast Nafion membranes at varying hydration levels. Additionally, the influence of temperature (300 K, 325 K, and 350 K) on TC was evaluated for both cast and GO-loaded membranes. It was found hydration level increment leads to a 14% TC enhancement, which was consistent with the literature results. On the other hand, the addition of GO reduced TC of the dry membrane by 4.7%. For dry membranes, temperature elevation induces slightly negative impacts on TC in both cast and GO-loaded samples. This reduction is primarily attributed to the fragmentation of connected water clusters, which weakens interchain heat transfer pathways. The water clusters’ fragmentation is more pronounced with the presence of GO. Further structural and interaction analysis revealed that the strong interactions of GO with water molecules prevented the formation of connected water clusters. These insights provide valuable guidance for optimizing the TC of PEMFC membranes, emphasizing that optimized GO dispersion, hydration control, and functionalization strategies are essential when incorporating GO-based PEMs to ensure efficient heat dissipation and long-term operational reliability.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:21 |
| Dernière modification: | 18 déc. 2025 15:21 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32486 |
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