Aufgabenstellung

In the future, electricity storage devices will become increasingly important parts of energy systems, especially for applications in context of e-mobility and everyday use. Lithium-ion batteries (LIB) are considered to be the basis for electrification due to their properties such as high energy density, high power density as well as long lifetime. To further optimize cell performance, cycle stability and the reduction of production costs, multilayer electrodes offer great potential. Currently, the understanding of the simultaneous multilayer slot-die coating process is a subject of research. In particular, the focus is set on the influences of the rheological properties of the electrode slurries as well as their gradients between the individual electrode layers on the coating stability of simultaneous multilayer coatings. In her bachelor thesis, Ms. Karagaac has to create an initial experimental matrix to expand the understanding of the influence of the fluid properties in a multilayer configuration on the stability of the coating and, based on this, conduct experiments for simultaneously coated multilayers. In doing so, findings based on a thorough literature review and from existing work on Newtonian fluids will be transferred to shear-thinning systems. For a systematic parameter study, suitable substitute systems are to be selected that allow improved and simplified adaptation of the rheological properties. These substitute systems are then to be combined on the basis of suitable viscosity ratios and coated simultaneously in multilayer configurations. The stability of the coating will be investigated by examining process windows experimentally.