Modeling the effect of calendering pressure on the microstructure and properties of Li-ion battery electrodes

Abstract

The microstructure changes of lithium-ion batteries significantly influence the performance, with calendaring being a crucial manufacturing step linked to the final microstructure. However, the current adjustments of compression parameters are empirical. This work aims to explain the impacts of calendaring force on the microstructure and electrical characteristics by a comprehensive model combining Discrete Element Method (DEM) and Finite Element Analysis (FEA), giving a validated model. A worthy correspondence between simulation and experimental findings was achieved. This work offers a validated combined model, intertwining the microstructure and electrochemical performance, furnishing a numerical simulation foundation for optimizing calendaring parameters for the electrode.