An Experimental Investigation of Multilayer Flow in a Slide Die Coating Process

Janghoon Park, Jason Pfeilsticker, Kristianto Tjiptowidjojo, P. Schunk, Scott Mauger, Michael Ulsh

Research output: NRELPoster


Roll-to-roll coating technology has been actively applied not only for conventional film production but also for emerging energy devices such as organic solar cells, organic light emitting diodes, batteries, smart windows, and fuel cells. The devices are multilayer structures requiring several coating and drying steps when implemented in a serial fashion, which increases capital costs and energy consumption. Simultaneous multilayer (ML) coating technologies present an opportunity for cost reductions and improved process efficiency by reducing equipment footprint and the number of process steps. In this talk, we experimentally investigate ML slide die coating flow for the manufacturing of fuel cell membrane electrode assemblies (MEAs). For ML slide coating, understanding fluid properties such as density, surface tension, and viscosity are necessary for stable flows and limiting intermixing of the miscible layers. Here, we utilize a design-of-experiment methodology - Box-Behnken design (BBD) - to correlate ink formulation parameters to fluid properties. Using the ink properties obtained from the BBD, we performed numerical flow simulations to obtain a proper process conditions to guide experimental coating trials. Finally, experimental verification is performed on a ML slide die and a degree of miscibility was observed for various ink formulation conditions.
Original languageAmerican English
StatePublished - 2020

Publication series

NamePresented at the 20th International Coating Science and Technology Symposium, 20-23 September 2020

Bibliographical note

See NREL/PR-5900-77527 for related presentation

NREL Publication Number

  • NREL/PO-5900-77528


  • fuel cell manufacturing
  • membrane electrode assembly
  • roll-to-roll coating


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