Scalable Processing Routes for the Production of All‐Solid‐State Batteries—Modeling Interdependencies of Product and Process

Abstract

The all‐solid‐state battery (ASSB) based on a solid ionic conductor is a significant future concept for energy storage. In respect of the growing global demand for batteries, a systematic study on processing thin‐layer and large‐area ASSBs is addressed herein. As ASSB cells are mainly produced on a laboratory scale, an introduction to industrial production is needed. Therefore, the formation, ranking, and selection of technology chains are presented concerning the strategic orientation of cell manufacturing companies. A system model consisting of five sub‐models is created, which connects technologies with production‐relevant parameters. The results are used for a tool that automatically generates and evaluates technology chains in dependence of the ASSB cell design. Starting from the layer fabrication technologies further up‐ and downstream processes are defined. For sulfidic solid electrolytes, e.g., a ball milling followed by the aerosol deposition method, hot pressing, and laser cutting are favorable in terms of high‐quality layers and low production volume, whereas planetary mixing, tape casting, calendering, and die cutting are the choice for a high‐throughput production. Based on these findings, processing routes for every cell design and solid electrolyte material can be generated concerning company‐specific criteria, thus enabling the industrial application.