Lithium sulfur cells
Lithium sulfur batteries are characterized by high gravimetric energy densities and low material costs. A challenge for the application of these cells results from the volume or thickness changes over the charge state, which can be up to 10 %. Due to this volume increase, special adjustments would be necessary on system level.
The project aims at developing a new generation of cells with a significantly reduced total density change and full capacity utilization by adapting the electrode materials and integrating them into overall cell concepts. At Fraunhofer IWS the complete process chain for the prototyping of cells up to 25 Ah has been established and first Li-S cells achieve specific energies > 400 Wh/kg. New electrode and material concepts can thus be transferred into multilayer pouch cells and evaluated closely to the application.