| Titre : |
Challenges of fabricating catalyst layers for PEM fuel cells using flatbed screen printing |
| Type de document : |
texte imprimé |
| Auteurs : |
Linda Ney, Auteur ; Jakob Hog, Auteur ; Rajveer Singh, Auteur ; Nathalie Göttlicher, Auteur ; Patrick Schneider, Auteur ; Sebastian Tepner, Auteur ; Matthias Klingele, Auteur ; Roman Keding, Auteur ; Florian Clement, Auteur ; Ulf Groos, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 73-86 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Carbone
Catalyseurs
Couches minces
Dispersions et suspensions
Electrochimie
Electronique imprimée
Encre d'imprimerie
Epaisseur -- Mesure
Evaporation
IonomèresUn ionomère est un copolymère thermoplastique « réticulé ioniquement ». La réticulation améliore la cohésion du polymère et la conductivité électrique.
Piles à combustible
Poudres
Rhéologie
Sérigraphie
solvants
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In this work, flatbed screen printing is evaluated regarding its capability to produce catalyst layers of PEM fuel cells. In the field of printed electronics, screen printing is regarded as robust and high-throughput coating technology. The possibility of in-plane structuring could be an additional degree of freedom, enabling more complex designs of catalyst layers in the future. In this study, process parameters are varied to investigate their effect on resulting layer thickness, homogeneity, and Pt-loading. With the usage of different screens, the Pt-loading can be adjusted. Additionally, two different pastes with and without water content are investigated. The catalyst paste without water showed a better process stability during printing and performed best under dry conditions (RH = 40%) and worst under wet conditions (RH = 100%) during electrochemical in-situ testing. Overall, the reproducibility of the CCM production process was verified. The viscosity of the catalyst paste with 19.55 wt% water in solvent was higher compared to the paste without water. Furthermore, a carbon paste (Pt-free) is developed in a similar viscosity range as the catalyst pastes. The main challenge of screen printing process development lies in the paste optimization to prevent evaporation effects over time, ensuring sufficient wetting of the paste on the substrate and sufficient fuel cell performance. |
| Note de contenu : |
- EXPERIMENTAL METHODS AND MATERIALS : Catalyst suspension - Rheological characterization - Flatbed screen printing process - Layer thickness measurement (SEM) - MEA fabrication and electrochemical in-situ testing
- RESULTS AND DISCUSSION : Rheological characterization - Flatbed screen printing with carbon suspension - Flatbed screen printing with catalyst suspension - Electrochemical characterization
- Table 1 : Characteristic properties of different suspensions prepared and printed in this study
- Table 2 : Manufacturer information about specific properties of the different screens used in this study
- Table 3 : Comparison of different meshes for the remaining paste within the mesh and the specific surface area Asurf,wire |
| DOI : |
https://doi.org/10.1007/s11998-022-00710-1 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-022-00710-1.pdf?pdf=button |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38830 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 73-86
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