Method and device for permanently bonding a polymer electrolyte membrane to at least one gas diffusion electrode

摘要

The invention relates to a permanent connection of a polymer electrolyte membrane to at least one gas diffusion electrode, wherein it is possible to create a particularly long-lasting connection therebetween by pressing the membrane and gas diffusion electrode and exerting external pressure, also enabling a particularly high degree of proton conductivity to be obtained between the membrane and the at least one electrode. In order to create the pressing movement, the pressure of a fluid is increased. The fluid enters into contact with the membrane and/or gas diffusion electrode(s) in a direct manner or via an elastic intermediate element.

主权项

1. A method for permanently bonding a polymer electrolyte membrane to a gas diffusion electrode, comprising:
enclosing the gas diffusion electrode by a frame of a same thickness as the gas diffusion element to prevent lateral deformation of the electrolyte membrane under effects of pressure and heat; disposing the membrane and the gas diffusion electrode within a sealed pressure chamber; within the sealed pressure chamber forming an air tight envelope comprising a fluid impermeable elastic intermediate element composed of one or several individual elements of a same material; arranging the intermediate element about the membrane and the gas diffusion electrode so as to completely enclose the membrane and the gas diffusion electrode; within the sealed pressure chamber, placing a fluid in contact with the membrane or the gas diffusion electrode, wherein the fluid contacts the membrane or the electrode via the elastic intermediate element; and increasing the pressure of the fluid to press the membrane and the gas diffusion electrode together within the sealed pressure chamber.