摘要:
A current collection board for a fuel cell comprises a substrate and current collection bars. The substrate includes at least one current collection region. The current collection bars are arranged corresponding to the current collection region; wherein each of the current collection bar includes a metallic pillar with copper covered by stainless steel.
摘要:
A fuel cell member-forming resin composition including (1) 67 to 89 wt % of a polypropylene-based resin, (2) 1 to 3 wt % of an acid-modified polypropylene-based resin, and (3) 10 to 30 wt % of carbon fibers and a high-purity ultrathin graphite powder having an ash content of less than 0.5 wt %.
摘要:
A device comprising a membrane electrode assembly, porous diffusion media, and at least one pair of bipolar plate assemblies is provided. The membrane electrode assembly is interposed between a pair of diffusion media substrates, the bipolar plate assembly comprises at least one flow field passage, and the bipolar plate assembly engages the diffusion media substrate. The diffusion media substrate comprises a fibrous matrix defining opposing first and second major faces. The substrate comprises an amount of carbonaceous material sufficient to render the substrate electrically conductive. An anion exchange resin layer engages at least a portion of at least one of the first and second major faces of the diffusion media substrate and/or the flow field passage. The anion exchange resin is configured to eliminate anions through exchange with hydroxyl groups or formation of quaternary ammonium salts.
摘要:
Through holes for flow paths of the fuel cell are formed in a thermoplastic polymer film by a process selected from a group consisting of laser drilling, etching and lithography, an inner side surface of the thermoplastic polymer film is coated with a metal layer, and the through holes are filled with a fuel diffusion material and a catalyst to provide an anode. The procedure is repeated to provide a cathode. Then, the anode and the cathode are placed to oppose each other. A cation conducting polymer membrane is disposed, between the anode and the cathode, and the anode, the cation conducting polymer membrane and the cathode are hot-pressed.
摘要:
A fuel cell (40) includes first and second catalysts (12′), (14′) secured to opposed surfaces of an electrolyte (16′); a first flow field (26′) secured in fluid communication with the first catalyst (12′) defining a plurality of flow channels (30A′, 30B′, 30C′, 30D′) between a plurality of ribs (32A′, 32B′, 32C′, 32D′, 32E′) of the first flow field (26′); and a backing layer (42) secured between the first flow field (26′) and the first catalyst (12′). The backing layer (42) includes a carbon black, a hydrophobic polymer, and randomly-dispersed carbon fibers (44). The carbon fibers (44) are at least twice as long as a width (46) of the flow channels (30A′, 30B′, 30C′, 30D′) defined in the adjacent first flow field (26′). The backing layer (42) replaces a known substrate (22) and diffusion layer (18).
摘要:
The invention relates to a bipolar plate, for fuel cells, characterised in comprising a layer of a hydrophobing material which is soluble in a solvent, on the surfaces thereof. Water forms small droplets on the surfaces of the bipolar plate due to said layer, which are loosely held on the surface of the bipolar plate and which can be reliably removed from the fuel cell even with low flow speeds for the operating gases. The thickness of the layer and thus the hydrophobicity thereof and the electrical contact resistance between the bipolar plate and a contacting electrode may be adjusted in a simple manner, by varying the concentration of the hydrophobing material in the solvent.
摘要:
The invention is a method for making a fuel cell layer by forming a porous substrate, adding two coatings to the porous substrate, forming distinct channels with walls, forming anodes and cathodes in the walls by depositing catalyst layers, disposing electrolyte in a portion of each channel, disposing a sealant barriers on different sides of the substrate and distinct channels, attaching a positive electrical and a negative electrical connection the porous substrate, attaching a fuel cell positive and negative electrical connection to each independent fuel cells forming a fuel cell layer, and disposing a sealant barrier around at least a portion of the fuel cell layer.
摘要:
This invention relates to a composite conducting material comprised of a mixture of flake graphite and thermoplastic polymer powder sintered at high pressure that can be used for realizing a fuel cell electrode. The mixture comprises a first type of flake graphite composed of flakes having a granulometry between 10 and 100 μm and/or a second type of flake graphite comprised of clusters of particles of graphite linked and superimposed upon each other in such a fashion that their principal planes are parallel to each other; said clusters having a planar anisotropy and having between 10 μm and 1 mm in length and between 5 and 50 μm in thickness, the mixture also comprising a thermoplastic polymer powder having a granulometry between 10 and 200 μm, the flakes and/or the clusters having their principal planes parallel to each other.
摘要:
In at least one embodiment, the present invention provides an electrically conductive fluid distribution plate and a method of making, and system for using, the electrically conductive fluid distribution plate. In at least one embodiment, the plate comprises a plate body defining a set of fluid flow channels configured to distribute flow of a fluid across at least one side of the plate, and a polymeric porous conductive layer proximate the plate body, with the porous conductive layer having a porosity sufficient to result in a water contact angle of the surface of less than 40°.