With the help of sintered paper technology, an improved all-metal gas diffusion layer (GDL) with regard to application, assembly properties and manufacturability is to be developed. The results should contribute to the development of a novel, cost-effective & compact PEM stack unit, with a focus on the simplest possible up-scaling for the large-scale production of all components. Possible applications are primarily in mobile fuel cell applications in passenger cars, trucks, buses & trains, perspectively in marine applications. The results can be transferred to stationary applications or adapted to PEM electrolyser concepts.