Edge Formation in High‐Speed Intermittent Slot‐Die Coating of Disruptively Stacked Thick Battery Electrodes

In industrial lithium‐ion battery manufacturing, patterned structured electrodes are required due to subsequent processes. In particular, novel and advanced cell stack formation processes cause challenging design requirements for electrode geometry. This work examines the influence of coating speeds up to 50 m min–1 and wet‐film thicknesses up to 400 µm on the coating edge quality. To determine the coating edge quality, the start‐up length in every pattern in the coating direction is compared for different coating parameters. Parameters such as speed and film thickness show no limiting effect, which makes high process speeds possible.