Influence of Calendering on the Variation in Material Compositions of the Composite Cathode of Polymer‐Based Solid‐State Batteries

ABSTRACT High energy densities are vital to satisfy the increasing demand for battery storage systems for electric vehicles. One innovative battery type of the next generation is the solid‐state battery, which is characterized by the high expected energy density. The polymer‐based solid‐state battery is notable for its high machinability in production and, therefore, offers great potential for industrial scale. One component of the polymer‐based solid‐state battery is the composite cathode, which faces particular challenges in the individual production processes. The calendering process is essential, as it can increase the ionic conductivity through a reduction of the composite cathode porosity. For this reason, the calendering process for polymer‐based composite cathodes with different compositions of active material and solid electrolyte has been analyzed in depth in this work. This enabled extensive analysis of the calendering process with different material compositions of polymer‐based composite cathodes to provide a profound understanding of the causal‐effect relationships.