Manufacturing of composite electrodes
A main motivation for the development of solid-state batteries, besides the increased energy content, is their intrinsic safety as these contain, in contrast to conventional lithium-ion batteries, no flammable liquid electrolyte. Solid-state electrolytes further possess a high level of electrochemical stability and can thus enable the use of novel high voltage electrodes with a high cycle stability. According to theoretical calculations, specific energies above 400Wh/kg and energy densities of more than 1200 Wh/L are possible.
The scalability and processing of solid-state batteries represents a particular challenge. Hybrid electrolytes made of inorganic materials and polymers offer a material option with a high potential. Hereby, the complex structure of these electrolytes as well as the electrical and the ionic conductivity must be ensured.
One of our focus points is the manufacture of composite cathodes consisting of active material and a solid-state electrolyte, e.g. via inert processing through extrusion. The development and understanding of the individual process steps are hereby particularly in focus.