Evaluation of columnar Silicon anodes in high energy Lithium-Ion- and solid state battery cells

100% Silicon anodes enable high energy density for future generation batteries.
However, challenges remain concerning their integration in full cells including mechanical stress-induced capacity fade.
Fraunhofer IWS is implementing vacuum deposited Silicon films with columnar microstructure in multilayer pouch cells for various cell chemistries.
Here we present evaluation results on NCM/Si full cells both for liquid as well as for sulfidic solid electrolyte concepts.
Impact of current collector design as well as external pressure application is studied on pouch cell level.
Enhanced energy density exceeding 1.000 Wh/L (stack level) and high rate capability is demonstrated.