Patent ID: 7585583

Claim:
A stack, to be used in a fuel cell or electrolyzer, comprising: a collector layer, said collector layer being a metal foil or metal plate, at least one anchoring layer, said anchoring layer comprising metal fibers, said anchoring layer having a thickness of less than 0.5 mm, at least one diffusion layer, said diffusion layer being a metal mesh or expanded metal sheet or a sheet of foamed metal, wherein said anchoring layer is provided between said collector layer and said diffusion layer, wherein said collector layer, anchoring layer and diffusion layer are sintered to each other, and at least one contact layer sintered to a side of said diffusion layer which is not connected to said anchoring layer, wherein said contact layer comprises metal fibers, wherein the at least one diffusion layer is a metal mesh, wherein the metal mesh comprises woven, knitted, or braided metal wires.