Ford Motor Company
Membrane electrode assembly for a fuel cell, method for preparing the membrane electrode assembly, fuel cell system and vehicle

Abstract:

A membrane electrode assembly for a fuel cell, with a membrane, a catalyst layer (16) and a gas diffusion layer. The catalyst layer (16) has a first side facing the membrane and a second side facing the gas diffusion layer. In the catalyst layer (16) an ionomer content increases towards the membrane. The catalyst layer (16) has a first sublayer (22) in which catalyst particles (26) are coated with a first ionomer (28). The catalyst layer (16) further has a second sublayer (24) with a second ionomer (32) which is closer to the membrane than the first sublayer (22). Pores (30) are present at least between the coated catalyst particles (26). Further, a method for preparing such a membrane electrode assembly, a fuel cell system and a vehicle with a fuel cell system.