摘要:
An integrated fuel cell assembly is described. The integrated fuel cell assembly includes a polymer membrane; an anode electrode and a cathode electrode on opposite sides of the polymer membrane; a pair of gas diffusion media on opposite sides of the polymer membrane, the gas diffusion media comprising a microporous layer and a gas diffusion layer, the anode electrode and the cathode electrode positioned between the polymer membrane and the pair of gas diffusion media; a subgasket positioned around a perimeter of one of the gas diffusion media, the subgasket defining an active area inside the perimeter, the subgasket having a layer of thermally activated adhesive thereon; and a bipolar plate sealed to the subgasket by the layer of thermally activated adhesive. Methods of making the integrated fuel cell assembly and assembling fuel cell stacks are also described.
摘要:
An integrated fuel cell assembly is described. The integrated fuel cell assembly includes a polymer membrane; an anode electrode and a cathode electrode on opposite sides of the polymer membrane; a pair of gas diffusion media on opposite sides of the polymer membrane, the gas diffusion media comprising a microporous layer and a gas diffusion layer, the anode electrode and the cathode electrode positioned between the polymer membrane and the pair of gas diffusion media; a subgasket positioned around a perimeter of one of the gas diffusion media, the subgasket defining an active area inside the perimeter, the subgasket having a layer of thermally activated adhesive thereon; and a bipolar plate sealed to the subgasket by the layer of thermally activated adhesive. Methods of making the integrated fuel cell assembly and assembling fuel cell stacks are also described.
摘要:
A fuel cell stack and a bipolar plate assembly is provided that may include straight-through tunnels to transport fluids from one side of a header seal to an opposite side of a header seal, fluidly connecting fuel cell stack reactant headers and bipolar plate reactant flow channels.
摘要:
A subassembly for a fuel cell includes a fuel cell plate having a first side and a second side. Each of the first side and the second side has a flow field disposed between a pair of headers. An insulating spacer abuts the first side of the fuel cell plate and is disposed adjacent a perimeter of the fuel cell plate. A unitized electrode assembly includes a subgasket, a membrane electrode assembly, and a pair of diffusion medium layers. The membrane electrode assembly has an electrolyte membrane sandwiched between a pair of electrodes. The membrane electrode assembly is sandwiched between the pair of diffusion medium layers. The subgasket surrounds, and is coupled to, the membrane electrode assembly. The subgasket abuts the insulating spacer. An elastomeric seal abuts the second side of the fuel cell plate.
摘要:
A bipolar plate for a fuel cell includes a pair of plates. Each plate has an active area, a header area, and a perimeter area. The perimeter area is disposed adjacent an edge of the plate. The perimeter area is also disposed adjacent to each of the active area and the header area. At least one of the plates includes a raised support feature having an inboard side and an outboard side. The plates are joined in the perimeter area between the outboard side of the raised support feature and the edges of the plates.
摘要:
A bipolar plate for a fuel cell includes a pair of plates. Each plate has an active area, a header area, and a perimeter area. The perimeter area is disposed adjacent an edge of the plate. The perimeter area is also disposed adjacent to each of the active area and the header area. At least one of the plates includes a raised support feature having an inboard side and an outboard side. The plates are joined in the perimeter area between the outboard side of the raised support feature and the edges of the plates.
摘要:
A subassembly for a fuel cell includes a fuel cell plate having a first side and a second side. Each of the first side and the second side has a flow field disposed between a pair of headers. An insulating spacer abuts the first side of the fuel cell plate and is disposed adjacent a perimeter of the fuel cell plate. A unitized electrode assembly includes a subgasket, a membrane electrode assembly, and a pair of diffusion medium layers. The membrane electrode assembly has an electrolyte membrane sandwiched between a pair of electrodes. The membrane electrode assembly is sandwiched between the pair of diffusion medium layers. The subgasket surrounds, and is coupled to, the membrane electrode assembly. The subgasket abuts the insulating spacer. An elastomeric seal abuts the second side of the fuel cell plate.
摘要:
A subgasket for a fuel cell is provided. The subgasket includes a barrier layer having an elongate primary seal formed thereon. The seal has at least one inwardly extending baffle adapted to militate against a reactant bypass flow in the fuel cell. A fuel cell and fuel cell stack having the subgasket are also provided.
摘要:
A subgasket for a fuel cell is provided. The subgasket includes a barrier layer having an elongate primary seal formed thereon. The seal has at least one inwardly extending baffle adapted to militate against a reactant bypass flow in the fuel cell. A fuel cell and fuel cell stack having the subgasket are also provided.
摘要:
A method of depositing a thin gold coating on bipolar plate substrates for use in fuel cells includes depositing a gold coating onto at least one surface of the bipolar plate substrate followed by annealing the gold coating at a temperature between about 200° C. to 500° C. The annealed gold coating has a reduced porosity in comparison with a coating which has not been annealed, and provides improved corrosion resistance to the underlying metal comprising the bipolar plate.