| Titre : |
High-speed slot-die coating of primer layers for Li-ion battery electrodes : model calculations and experimental validation of the extended coating window depending on coating speed, coating gap and viscosity |
| Type de document : |
texte imprimé |
| Auteurs : |
Sandro Spiegel, Auteur ; Alexander Hoffmann, Auteur ; Julian Klemens, Auteur ; Philip Scharfer, Auteur ; Wilhelm Schabel, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 493-505 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Accumulateurs lithium-ion
Caractérisation
Enduction par filière
Primaire (revêtement)
Revêtements
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In the battery industry, very thin primer layers are used to improve electrode adhesion on substrates or act as blocker layers to prevent corrosion in case of aqueous cathodes. For these material configurations, high-speed coating is mandatory to ensure the economic viability of the process. One way to realize high-speed coating is a set-up including a slot die and a vacuum box to stabilize the coating bead. Knowledge and prediction of the coating window of thin wet film thicknesses is crucial to design the production process. Therefore, the influence of coating gap and viscosity of shear-thinning fluids on the coating window is investigated with the help of various model fluids. In addition, a prediction model for the calculation of the coating window for high-speed slot-die coating with vacuum box is developed. This model is shown to be valid for the prediction of the coating window for the investigated material systems and coating gaps over the investigated range of coating speeds up to 500 m min−1. For a material system, which corresponds to a real material system for adhesive primer coatings, it is possible to reach a target wet film thickness of 20–25 µm. This would correspond to a layer thickness of 0.5 µm for a solid content of 2–2.5 wt%. |
| Note de contenu : |
- EXPERIMENTAL METODS AND MATERIALS : Slurry preparation -
Experimental coating set-up and coating window characterization
- RESULTS AND DISCUSSION : Prediction of process stability
systems - Validation of the model
- Table 1 : Calculated factors and exponents of equation
- Table 2 : CMC content of the used model fluids
- Table 3 : Power-law parameters of the investigated material
- Table 4 : Ranges of shear rate of the investigated coating gaps and coating speeds |
| DOI : |
https://doi.org/10.1007/s11998-023-00877-1 |
| En ligne : |
https://drive.google.com/file/d/17hIPyd8QtYMw8OWK2qCN7fv_6bZaCokf/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40772 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 493-505
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High-speed slot-die coating of primer layers for Li-ion battery electrodes : model calculations and experimental validation of the extended coating window depending on coating speed, coating gap and viscosity in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
