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°.
摘要:
In at least one embodiment, the present invention provides a hydrophilic electrically conductive fluid distribution plate and a method of making, and system for using, the hydrophilic 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 composite conductive coating having a water contact angle of less than 40° adhered to the plate body. In at least one embodiment, the composite coating comprises a polymeric conductive layer adhered to the plate body having an exterior surface, and a particulate carbon layer adhered to the exterior surface of the polymeric conductive layer.
摘要:
A proton exchange membrane fuel cell including a membrane electrode assembly comprising a proton transmissive membrane, a catalytic anode layer on one face of the membrane, and a catalytic cathode layer on the other face of the membrane. The fuel cell further includes a gas distribution layer on each of the cathode and anode layers defining a gas flow field extending over each of the catalytic layers. The membrane electrode assembly has a convoluted configuration whereby to increase the ratio of membrane area to planar fuel cell area and thereby increase the electrical output of the fuel cell for a given planar area size fuel cell. The convoluted configuration of the membrane electrode assembly also facilitates the division of the gas distribution layers into separate parallel channels thereby allowing the use of an inexpensive foam material for the gas distribution layers irrespective of the inherent variations in porosity of foam materials.
摘要:
A bipolar plate for use with a fuel cell is provided including an electrically conductive foam as a coolant layer between thin metal foil layers. The thin metal foil layers are provided with serpentine flow field patterns on a surface thereof.
摘要:
A proton exchange membrane fuel cell comprising a proton transmissive membrane, a catalytic anode layer on one face of the membrane, a catalytic cathode layer on the other face of the membrane, and a gas distribution layer on each of the cathode and anode layers defining a gas flow field extending over each of the catalytic layers. Each of the gas distribution layers comprises a layer of open cell conductive foam material which is divided into a plurality of generally parallel segments extending from one edge of the fuel cell to an opposite edge of the fuel cell whereby to define a plurality of generally parallel porous reactant paths extending across each catalytic layer. The segments may be defined by selectively varying the porosity of the foam material or selectively varying the thickness of the foam material. Reactant gases are delivered to the foam gas distribution layers via a manifold structure in which the reactant gases are moved upwardly along an edge of the fuel cell stack in parallel paths and selectively distributed within the stack at the desired cathode or anode levels by selective baffling and partitioning structures. A coolant layer may also be provided utilizing the same segmented foam construction utilized in the anode and cathode layers. The resultant fuel cell is lighter, smaller, and less expensive than prior art cells having comparable per surface area unit electrical energy output.
摘要:
The present invention provides an electrically conductive element for an electrochemical cell element having enhanced protection for an underlying metal substrate with a surface susceptible to forming metal oxides. One or more regions of the surface are coated with a metal coating overlaid with an adhesion promoting coating comprising a silicon containing material derived from organosilanes. The adhesion promoting coating is overlaid with a conductive, protective polymeric coating. The present invention further provides methods of making such an electrochemical cell element to have improved adhesion of conductive, protective polymer coatings.
摘要:
A photographic element comprising a polyester support; an antistatic layer; and a transparent magnetic layer comprising a cellulose binder, ferromagnetic particles and a blocked isocyanate.
摘要:
A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particles. The substrate may have an oxidizable metal first layer (e.g., stainless steel) underlying the polymer coating.
摘要:
The present invention provides an electrically conductive element for an electrochemical cell element having enhanced protection for an underlying metal substrate with a surface susceptible to forming metal oxides. One or more regions of the surface are coated with a metal coating overlaid with an adhesion promoting coating comprising a silicon containing material derived from organosilanes. The adhesion promoting coating is overlaid with a conductive, protective polymeric coating. The present invention further provides methods of making such an electrochemical cell element to have improved adhesion of conductive, protective polymer coatings.
摘要:
A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particles. The substrate may have an oxidizable metal first layer (e.g., stainless steel) underlying the polymer coating.