Abstract: A method is provided for producing a green paper for producing a gas diffusion layer (GDL) for a fuel cell. A use is described of an accordingly produced gas diffusion layer (GDL) in a fuel cell. A first paper web is loaded with metal powder and/or metal fibers, and a microporous layer (MPL) is in the form of at least one coating is applied onto the paper web. The paper web is then subjected to a binder removal process, a sintering process, a coating process, atomic layer deposition (ALD) using thermal ALD methods, and optionally additional process steps in order to obtain the final GDL. After the sintering process, all of the organic components of the green paper are pyrolyzed and thus no longer contained in the GDL, and the GDL consists virtually exclusively of a metal framework.

Abstract: A method is provided for producing a green paper for producing a gas diffusion layer (GDL) for a fuel cell. A first paper web is formed, and a second paper web is formed, which are brought together with and rigidly connected to the first paper web while still wet. The first paper web and the second paper web are mixed with metal powder and/or metal fibers and together form the green paper, optionally together with additional components and/or coatings. The final GDL is provided after a binding-removal process, a sintering process, a coating process, a (thermal) deposition process (atomic layer deposition process, ALD), and optionally additional process steps.

Abstract: A green paper is provided for producing a gas diffusion layer (GDL) for a fuel cell. A process is for producing a green paper for producing a gas diffusion layer (GDL) for a fuel cell. The green paper includes at least one first, watermarked paper web. The watermark forms the patterning for the flow field or gas distribution structure of the gas diffusion layer (GDL) produced from the green paper. The first paper web is admixed with metal powder and/or metal fibres. The eventual GDL is formed after debindering, sintering, coating, deposition of atomic layers (ALD—atomic layer deposition) and further operating steps.