Slot Die Coating for Battery and Fuel Cell Manufacturing
topic
Slot die coating in energy device manufacturing applies cathode and anode electrode slurries containing lithium metal oxide, graphite, conductive carbon, and binder at 100 to 300 micrometres wet thickness onto copper or aluminium current collector foils at speeds of 20 to 80 metres per minute in cleanroom-compatible environments with dried coating weight uniformity within plus or minus 1 gram per square metre and coating density controlled by calendering after drying.
Role
Produces the electrode coatings that determine lithium-ion battery energy density and cycling performance through the uniformity and density of the active material coating that governs the electrochemical capacity per unit area and the internal resistance of the battery cell, with electrode coating uniformity being the single most critical process parameter in battery manufacturing where coating weight variation translates directly into capacity variation between cells.