摘要:
One exemplary embodiment discloses a bipolar plate assembly including a cathode plate and an anode plate. Each of the cathode plate and the anode plate includes a core material, a first surface material coupled to a first side of the core material, and a second surface material coupled to a second side of the core material, wherein the first surface material and the second surface material have a different composition from the core material.
摘要:
A bipolar plate for a fuel cell is provided including a plate having an active surface with a plurality of flow channels formed therein. The plurality of flow channels have a hydrophilic coating deposited thereon and define a plurality of lands disposed therebetween. The plurality of lands is substantially free of the hydrophilic coating. Furthermore, a thickness of the hydrophilic coating is substantially constant along a length of the active surface and an edge of the hydrophilic coating adjacent the plurality of lands is substantially continuous. A method for preparing the bipolar plate is also provided.
摘要:
A PEM fuel cell having a current collector comprising a polymer composite and a diffusion media engaging said polymer composite. The polymer composite has a hyperconductive surface layer engaging the diffusion media to reduce the contact resistance therebetween. The hyperconductive surface layer is formed by depositing or smearing an electrically-conductive material on the surface of the polymer composite.
摘要:
A bipolar plate for a fuel cell is provided including a plate having an active surface with a plurality of flow channels formed therein. The plurality of flow channels have a hydrophilic coating deposited thereon and define a plurality of lands disposed therebetween. The plurality of lands is substantially free of the hydrophilic coating. Furthermore, a thickness of the hydrophilic coating is substantially constant along a length of the active surface and an edge of the hydrophilic coating adjacent the plurality of lands is substantially continuous. A method for preparing the bipolar plate is also provided.
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 an electrically conductive fluid distribution plate comprising a metallic plate body defining a set of fluid flow channels configured to distribute flow of a fluid across at least one side of the plate, a metal-containing adhesion promoting layer having a thickness less than 100 nm disposed on the plate body, and a composite polymeric conductive layer disposed on the metal-containing adhesion promoting layer.
摘要:
A process of one embodiment of the invention includes providing a fuel cell bipolar plate comprising carbon exposed at an outer surface of the bipolar plate and reacting a diazonium salt with the exposed carbon so that a functional group is attached to the exposed carbon to increase the hydrophilicity of the bipolar plate where the functional group is attached.
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:
System and methods for mitigating battery damage in a vehicle including a liquid-cooled battery system. In certain embodiments, a system for mitigating damage caused by leaks of liquid coolant in a battery system may include a one or more coolant leak sensors. A coolant leak detection system communicatively coupled to the coolant leak sensors may be configured to detect an occurrence of a liquid coolant leak in the battery system based on information provided by the coolant leak sensors. One or more valves communicatively coupled with the coolant leak detection system may actuate by the coolant leak detection system when a leak of liquid coolant is detected, thereby allowing leaked liquid coolant to drain from the battery system.
摘要:
Methods of coating a nonconductive oxide ceramic on lithium-ion battery separators are provided. A separator is placed in a solution of a volatile organic solvent and an organometallic compound. The separator is coated with a ceramic formed from a metal oxide component of the organometallic compound when the volatile organic solvent evaporates.
摘要:
Corrosion resistant, manganese-stabilized austenitic stainless steels with a low nickel content are used in bipolar plates, methods for fabricating the bipolar plates, and polymer electrolyte membrane (PEM) fuel cells comprising the bipolar plates. The bipolar plates are formed from high-manganese austenitic stainless steels comprising, in weight percents, 4.0 to 35 manganese, 0.5 to 1.5 nickel, 17 to 20 chromium, 0.2 to 0.5 nitrogen, up to 0.075 carbon, 0.5 to 1.0 silicon, up to 0.1 aluminum, 0 to 0.005 sulfur, and balance iron and incidental impurities. The steels exhibit suitable corrosion resistance, electrical contact resistance, and mechanical properties for high-corrosion applications such as use in bipolar plate materials for PEM fuel cells. The bipolar plates may comprise a solid plate of the steel, optionally coated with a highly electrically conductive material. Alternatively, the bipolar plates may comprise an economical substrate coated with the steel, optionally further coated with a highly electrically conductive material.