Polymer Electrolyte Fuel Cell Degradation Investigations Using X-Ray Computed Tomography
Notice bibliographique
Résumé
On-going research is aimed at commercializing low temperature fuel cell technology systems as zero emission alternatives for automotive applications in order to reduce greenhouse gas emissions and air pollution. These systems use polymer electrolyte fuel cells (PEFCs) to generate electricity via an electrochemical process using hydrogen and ambient air (oxygen) to produce water. Advantages of PEFCs include quick start-up time, low operating temperature, low weight, high efficiency, and relatively simple design. An important area of current research is the identification of factors which affect fuel cell performance degradation during operation and ultimately, its durability. A technique that has yielded new insights in the investigation and identification of failure modes in fuel cells is lab-based X-ray computed tomography (XCT), which is most advantageous due to its on-demand availability. The Fuel Cell Research Laboratory (FCReL) at Simon Fraser University currently operates Canada’s only facility for multi-length scale XCT, comprising of two state-of-the-art laboratory-based XCT scanners from Carl Zeiss X-ray Microscopy (Zeiss Xradia 520 Versa and 810 Ultra) with complementary resolution and field of view capabilities. This unique combination offers unprecedented access to investigations at multi length scales; with an ability to probe fuel cell components at the micro as well as the nano scale. Figure 1 illustrates the fuel cell holder and its orientation with respect to the X-ray beam as well as an exploded view of the miniature fuel cell design. An overview of recent fuel cell degradation investigations at FCReL using the XCT technique will be shown. The XCT based workflow facilitates determination and quantification of material structure and properties changes resulting from degradation stresses associated with operational parameters such as temperature, relative humidity, and voltage. The non-destructive nature of lab-based XCT visualization coupled with the ability to scan the same fuel cell multiple times without inducing damage [1] has enabled detailed studies of fuel cell degradation evolution in four dimensions (3D space, 1D time) [2 - 4]. The new knowledge gained from this procedure has led to root cause identification with respect to membrane and catalyst layer crack initiation and propagation [5 - 7], sealing issues [8,9], and subsequent mitigation toward enhanced fuel cell durability. Acknowledgement This research was supported by the Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, British Columbia Knowledge Development Fund, Western Economic Diversification Canada, Canada Research Chairs, and Ballard Power Systems. References: [1] R.T. White, M. Najm, M. Dutta, F.P. Orfino, E. Kjeang, J. Electrochem. Soc. 163 (2016) F1206-F1208 [2] R.T. White, A. Wu, M. Najm, F.P. Orfino, M. Dutta, E. Kjeang, J. Power Sources 350 (2017) 94-102 [3] R. T. White, S. H. Eberhardt, Y. Singh, T. Haddow, M. Dutta, F. P. Orfino, E. Kjeang, Scientific Reports, (2019) 9:1843 [4] R. T. White, D. Ramani, S. H. Eberhardt, M. Najm, F. P. Orfino, M. Dutta, and E. Kjeang, J. Electrochem Soc, 166 (2019) F914-F925 [5] Y. Singh, R. T. White, M. Najm, T. Haddow, V. Pan, F. P. Orfino, M. Dutta, and E. Kjeang, J. Power Sources, 412 (2019) 224 [6] D. Ramani, Y. Singh, R. T. White, M. Wegener, F. P. Orfino, M. Dutta, and E. Kjeang, International Journal of Hydrogen Energy, 45 (2020) 10089-10103 [7] D. Ramani, Y. Singh, R. T. White, T. Haddow, M. Wegener, F. P. Orfino, L. Ghassemzadeh, M. Dutta, and E. Kjeang, Electrochimica Acta 380 (2021) 138194 [8] Y. Chen, Y. Singh, D. Ramani, F. P. Orfino, M. Dutta, and E. Kjeang, J. Power Sources, 520 (2022) 230674 [9] Y. Chen, Y. Singh, D. Ramani, F. P. Orfino, M. Dutta, and E. Kjeang, J. Power Sources, 520 (2022) 230673 [10] J. Stoll, F. P. Orfino, M. Dutta, and E. Kjeang, J. Electrochem Soc, (2021) 168 024516 Figure 1
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Prédiction distillée sur la base complète
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Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
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