A method to produce a gas diffusion layer and a fuel cell comprising a gas diffusion layer

P. Boillat (Inventor), F.N. Büchi (Inventor), Lorenz Gubler (Inventor), Antoni Forner Cuenca (Inventor), Celestino Padeste (Inventor)

Research output: PatentPatent publication

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Abstract

The present invention discloses a method of manufacturing gas diffusion layers (GDL) with a defined pattern of hydrophobic and hydrophilic regions. The method to produce electrically conductive porous materials with distributed wettability comprises the steps of: a) Coating the external and internal surfaces of a porous base material made of carbon fiber or Titanium with Fluoroethylene-Propylene (FEP) and/or perfluoroalkoxy (PFA) and/or Ethylene-Tetrafluoroethylene (ETFE) or any other hydrophobic polymer; b) Exposing the coated material to irradiation through a blocking mask such that only parts of the coated porous material are exposed; c) Immersing the previously exposed material in a monomer solution and heating to a temperature higher than 45°C, resulting in the graft co-polymerization of monomers on the FEP layer.
Original languageEnglish
Patent numberWO2016037833
Filing date21/08/15
Publication statusPublished - 17 Mar 2016

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