Solid-state batteries provide a high level of safety and reliability. One focus of work in the Cell Concepts working group is the development of components for electrolytes and composite cathodes of lithium or sodium batteries. Some of the materials tested for use in solid-state batteries using electrochemical processes were developed at Fraunhofer IKTS itself, others are commercially available materials. Furthermore, suitable processes for the construction of cells from their individual components, interactions between the components and surface reactions are also tested.
For these purposes, the working group uses an extensive glovebox system. It allows the handling of suspensions and samples that are sensitive to water and air and can be processed further and incorporated in test cells. The work focuses on ceramic electrolytes as well as hybrid systems consisting of polymers and ceramic particles.
Beside electrochemical characterization, Fraunhofer IKTS offers a wide range of analytical methods, such as REM, XRD, thermal analytics and microscopy. These methods are also used in post-mortem analyses of solid-state battery cells and electrolytes.
- Electrochemical measurement at solid-state electrolytes (impedance, cycling etc. in the -20 °C to 100 °C temperature range)
- Manufacture and processing of suspensions and solutions in inert gas atmosphere, e. g. work under Schlenk’s conditions
- Vapor deposition of various metals in the glovebox, e. g. lithium vapor deposition of solid electrolyte
- Hot pressing of pellets in the glovebox
- Comprehensive material analytics (XRD, REM, TGA, DSC etc.)