Abstract:
A method of storing oxygen in a cathode including an oxygen storage metal-organic framework (“MOF”) material comprising a mixture of ionic conductive material, electron conductive material and catalyst material within the MOF.
Abstract:
In at least one embodiment, a lithium-ion battery is provided comprising a positive electrode, a negative electrode, an electrolyte, and a separator situated between the electrodes. At least one of the electrodes may include a proton absorbing material. The proton absorbing material may be an atomic intermetallic material including a proton absorbed state. The proton absorbing material may react with protons in the electrolyte to reduce moisture formation and cathode degradation in the battery. The proton absorbing material may absorb at least 0.5 wt. % hydrogen and may be present in the anode and/or cathode in an amount from 0.01 to 5 wt. %.
Abstract:
A catalyst assembly having a substrate including an intermetallic compound of W and Ir. The weight ratio of W to Ir is in a range between a first ratio and a second ratio. A catalyst includes at least one noble metal is supported on and contacts the substrate. The first ratio may be in the range of 48:52 and the second ratio may be in the range of 51:49.
Abstract:
A fuel cell includes a plurality of unit cells disposed in a stack. Each unit cell includes a membrane electrode assembly (MEA) having an anode and a cathode and a bipolar plate having a cathode side defining a recessed pocket in fluid communication with an air port, an anode side, and coolant channels between the cathode and anode sides. The bipolar plate is disposed against the MEA such that the cathode is disposed over the pocket. A flow guide is disposed in the pocket with a front side facing the MEA and a back side facing a bottom of the pocket. The flow guide has a plurality of embossments.
Abstract:
A bipolar plate for a fuel cell includes an anode plate and a cathode plate. The anode plate has hydrogen flow channels on a first side of the anode plate and coolant channels on a second side of the anode plate. The cathode plate has a first side disposed against the second side of the anode plate to cover the coolant channels and has a second side defining a recessed pocket configured to receive a stream of air. A flow guide is disposed in the pocket such that an inlet manifold is formed along a first edge of the flow guide and an outlet manifold is formed along a second edge of the flow guide. The flow guide defines channels extending from the inlet manifold to the outlet manifold. A plurality of openings is defined by through the flow guide.
Abstract:
A fuel cell system includes a plurality of fuel cells. Each of the fuel cells may include a current bypass device that is configured to flow a current responsive to an anode potential exceeding a cathode potential to prevent carbon corrosion within the fuel cell.
Abstract:
In one or more embodiments, an electrochemical device includes a substrate having a substrate surface; an amorphous metal oxide layer supported on the substrate surface; and a noble metal catalyst supported on the amorphous metal oxide layer to form a catalyst layer. The amorphous metal oxide layer may contact only 25 to 75 percent of the substrate surface. The amorphous metal oxide layer may include less than 10 weight percent of crystalline metal oxide. In certain instances, the amorphous metal oxide layer is substantially free of crystalline metal oxide.
Abstract:
In one or more embodiments, an electrochemical device includes a catalyst promoter including an amorphous metal oxide, the amorphous metal oxide being of an amount greater than 50 percent by weight of the total weight of the substrate, and a substrate including graphene and supporting the substrate.
Abstract:
A fuel cell includes a plurality of unit cells disposed in a stack. Each unit cell includes a membrane electrode assembly (MEA) having an anode and a cathode and a bipolar plate having a cathode side defining a recessed pocket in fluid communication with an air port, an anode side, and coolant channels between the cathode and anode sides. The bipolar plate is disposed against the MEA such that the cathode is disposed over the pocket. A flow guide is disposed in the pocket with a front side facing the MEA and a back side facing a bottom of the pocket. The flow guide has a plurality of embossments.
Abstract:
An electrode for a fuel cell includes a catalyst layer adjacent to a gas diffusion layer and a proton exchange membrane, and ionomer-free active metal-loaded carbon nanostructures and active metal-free ionomer-coated carbon nanostructures arranged to define pores therebetween to facilitate transport of reactant gases and product water in the fuel cell.