Fuel cell membrane sub-seal assemblies with coated sub-gaskets as well as fuel cell assemblies and fuel cell stacks with the fuel cell membrane sub-seal assemblies

摘要

Fuel cell membrane subgasket assemblies may include an electrolyte membrane and a coated subgasket overlaying the electrolyte membrane around a perimeter of the electrolyte membrane so as to define an active area within the perimeter. The coated subgasket may include a subgasket body formed from a subgasket material. At least one side of the coated subgasket comprises a subgasket cover layer comprising a coating material such as e.g. B. metals, ceramics, polymers, polymer composites or other hard material coatings or is formed from them. Fuel cell assemblies may include gas diffusion media, a bipolar plate, and a fuel cell membrane subgasket assembly with a coated subgasket. Fuel cell stacks may include clamp plates, unipolar end plates, and a plurality of individual fuel cell assemblies, at least one of which includes a fuel cell membrane subgasket assembly with a coated subgasket.