Process modeling of the electrode calendering of lithium-ion batteries

regarding variation of cathode active materials and mass loadings

Calendering Compaction model Porosity Ni-rich

A B S T R A C T：

In this study, a Heckel-based model equation is supplemented by a predictive model for the lowest achievable coating porosity based on the theoretical packing structures of equally sized spheres. Using this approach, the influence of different active materials, varying in particle size distribution and mechanical characteristics, on the compaction behavior is examined. An addition of smaller particles as well as increased initial porosities due to coarser particles decrease the compaction resistance. Furthermore, the impact of increasing mass loadings of the coating on the compaction resistance is analysed, resulting in a linear proportional relationship for the considered range from 80 to 280 g/m2.