Bipolar stacking of solid state sulfide batteries (BiSSFest)
3 years (01.12.2021 -30.01.2024)
Funding: 462.743 € (TU BS)
Institute for Particle Technology, TU Braunschweig (project coordinator)
NETZSCH Feinmahltechnik GmbH
IBU-tec advanced materials AG
Customcells Holding GmbH
Institute of Machine Tools and Production Technology, TU Braunschweig
Fraunhofer Institute for Surface Engineering and Thin Films (IST), Braunschweig
Institute for Inorganic and Analytical Chemistry, WWU Münster
Associated: BASF SE
Solid state batteries with a solid electrolyte instead of a liquid can potentially enhance the energy and power density of lithium-ion batteries. Apart of this, the battery safety can be improved due to the inflammable character of the solid electrolyte. One promising group as solid electrolyte are sulfides, which provide high ionic conductivities. To further advance the development of sulfidic solid-state batteries and pave a way for industrial production, their processing has to be transferred from lab- to pilot-scale.
The project aim is to evaluate scalable process technologies from the synthesis of the electrolyte up to the assembly of bipolar solid state batteries. Bipolar stacking would further allow an increase of energy density. Moreover, optimizations on material level will be addressed to improve, for instance, electrolyte/electrode interface characteristics. Finally, investigations with respect to the electrochemical performance and safety will be done to derive recommendations for the industrialization of SSB production.