drying of lithium ion battery (lib) electrodes

KIT – The Research University in the Helmholtz Association Acknowledgements: This work was funded by the Federal Ministry of Education and Research (BMBF) within the cluster project “ProZell” (Funding Nr. 03XP0073B). Parts of this work were funded by the German Research Foundation (DFG, grant SCHA 1266/9-1) and the Federal Ministry of Economic Affairs and Energy (BMWI, 03ET6016) based on a parliamentary resolution of the Deutsche Bundestag. Institute of Thermal Process Engineering Thin Film Technology M. Sc. Jana Kumberg Tel: +49 721 / 608-45736 www.tft.kit.edu | www.tvt.kit.edu | [email protected] High Drying Rate (HDR) Low Drying Rate (LDR) Part of HighEnergy - ProCell Defined Coating Defined Drying Understanding of drying mechanisms e.g. Kryo-REM: Cross sections of wet LIB anodes High capacity electrodes (thicker coatings, high capacity additives,...) Multilayer coatings: simultaneous vs in between drying step Variation of: additive content pore size (active material size)... Mixing Coating & Drying Calendering Cell stacking Simplified Process Chain of Lithium Ion Battery Production Graphite Carbon Black Binder Solvent Graphite Carbon Black + Binder Solvent removal Graphite Microstructure Formation during Drying Paste formulation and coating of slurry Cross section of dry LIB anode: porous network of graphite and additives adhesion no adhesion Binder detection: REM+EDX binder inhomogenities : LDR evenly distributed binder HDR: binder accumulation on surface Jaiser, S.; Funk, L.; Baunach, M.; Scharfer, P.; Schabel, W. ; Journal of colloid and interface science; 2017 Jaiser, S.; Kumberg, J.; Klaver, J.; Urai, Janos L.; Schabel, W.; Schmatz, J.; Scharfer, P.; Journal of Power Sources; 2017 surface substrate surface substrate binder conc. Drying highly influences microstructure formation Drying of Lithium Ion Battery (LIB) Electrodes Solvent removal Müller, M.; Pfaffmann, L.; Jaiser, S.; Baunach, M. et al.; Journal of Power Sources; 2017 Challenges Research 10 µm 200 nm Carbon Black LIB anode during drying Slurry

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Page 1: Drying of Lithium Ion Battery (LIB) Electrodes

KIT – The Research University in the Helmholtz Association

Acknowledgements: This work was funded by the Federal Ministry of Education and Research (BMBF) within the cluster project “ProZell” (Funding Nr. 03XP0073B). Parts of this work were funded by the German Research Foundation (DFG, grant SCHA 1266/9-1) and the Federal Ministry of Economic Affairs and Energy (BMWI, 03ET6016) based on a parliamentary resolution of the Deutsche Bundestag.

Institute of Thermal Process Engineering

Thin Film Technology

M. Sc. Jana Kumberg

Tel: +49 721 / 608-45736

www.tft.kit.edu | www.tvt.kit.edu | [email protected]

High Drying Rate (HDR)Low Drying Rate (LDR)

Part of HighEnergy - ProCell

Defined Coating Defined Drying

Understanding of drying mechanismse.g. Kryo-REM: Cross sections of wet LIB anodes

High capacity electrodes (thicker coatings, high capacity additives,...)

Multilayer coatings:

simultaneous vs