Solid-state batteries have shown significant promise for advancing energy storage technologies, especially for high-demand applications such as electric vehicles. This study has focused on understanding and optimizing the microstructures resulting from slurry-based manufacturing processes of SSB composite cathodes to enhance their performance. We present a 3D-resolved physics-based computational workflow able to simulate thoroughly the manufacturing process of SSB composite electrodes using NMC811 as AM. The workflow has as inputs the materials and manufacturing process parameters.