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A novel slurry concept for the fabrication of Lithium-Ion battery electrodes with beneficial properties

Bitsch, B.; Dittmann, J.; Schmitt, M.; Scharfer, P.; Schabel, W.; Willenbacher, N.

A novel slurry concept for the fabrication of Li-ion battery electrodes focusing on water based formulations is presented. Taking advantage of capillary forces inferred by adding a small fraction of a second fluid immiscible with the bulk continuous phase the low shear viscosity can be varied in a wide range without conventional polymeric rheology control agents disturbing the electric properties of the dry electrode. The new slurries provide superior storage stability and excellent shape accuracy of the final dry film. This reduces waste cut-off at the edges and increases the density of active ingredients, thus improving cost-efficiency. The viscosity at high shear rates remains unaffected, thus the slurries can be processed and coated using established equipment and process parameters. Adhesion to the conductor foil and electrochemical properties of the electrode layers and corresponding cells are similar to those made from conventional slurries.

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DOI: 10.5445/IR/1000041853
DOI: 10.1016/j.jpowsour.2014.04.115
Zitationen: 51
Web of Science
Zitationen: 45
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Institut für Mikrostrukturtechnik (IMT)
Institut für Thermische Verfahrenstechnik (TVT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator ISSN: 0378-7753, 1873-2755
KITopen-ID: 1000041853
HGF-Programm 43.22.03 (POF II, LK 01)
Erschienen in Journal of power sources
Band 265
Seiten 81-90
Schlagworte lithium-ion batteries, capillary suspension, electrode processing, slurry viscosity, flow properties
Nachgewiesen in Web of Science
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