Abstract:
A fuel cell stack (100) includes a plurality of cells (10) that are stacked in a stacking direction. Each cell (10) includes a power generating body (1) and a pair of separators (2). The separators (2) respectively are arranged on opposite surfaces of the power generating body (1) in the stacking direction. Each separator (2) includes a first surface (2a) and a second surface (2b). A titanium nitride layer (3) is formed on the first surface (2a), and a conductive carbon layer (4) is formed on the titanium nitride layer (3). A titanium nitride layer (3) is formed on the second surface (2b). Each separator (2) is in contact with the power generating body (1) via the titanium nitride layer (3) and the carbon layer (4) on the first surface (2a) and is in contact with one of the separators (2) of an adjacent cell (10) via the titanium nitride layer (3) on the second surface (2b).
Abstract:
The invention relates to a device for increasing the service life of a high-temperature polymer electrolyte membrane fuel cell. The device comprises an HT-PEM fuel cell with at least one cell. The cell is constructed in the following sequence: a feeding plate with an anode channel structure, an anode gas diffusion electrode, an electrolyte-containing polymer membrane, a cathode gas diffusion electrode, and a feeding plate with a cathode channel structure. Additionally, at least one acid reservoir is provided which is filled with acid, said acid reservoir being connected to a distributor channel which extends in the feeding plates approximately perpendicularly to the channel structures. The distributor channel is connected to at least one of the gas diffusion electrodes and/or the polymer membrane of at least one of the cells of the fuel cell stack such that at least one of the gas diffusion electrodes and/or the polymer membrane of at least one of the cells of the fuel cell stack can be supplied with acid.
Abstract:
This invention describes a low-cost, lightweight, high-performance composite bipolar plate for fuel cell applications. The composite bipolar plate can be produced using stamped or pressed into the final form including flow channels and other structures prior to curing.
Abstract:
The technology disclosed here relates to a fuel cell having an ion-selective separator, a gas diffusion layer and a separator plate. The separator plate forms, together with the gas diffusion layer, at least one gas-conducting flow field. At least one first convergent duct section and at least one first divergent duct section are formed in the flow field, wherein the convergent duct section lies adjacent to the divergent duct section. A first barrier is provided between the convergent duct section and the divergent duct section such that the gas flows at least partially through the gas diffusion layer in order to pass directly from the convergent duct section into the divergent duct section. At least one additional convergent duct section, at least one additional divergent duct section and at least one additional barrier are provided downstream of the at least one convergent duct section and/or downstream of the at least one divergent duct section.
Abstract:
A fuel cell module includes an electrode membrane assembly and a pair of separators. The electrode membrane assembly includes an electrode portion and a pair of gas diffusion layers. The electrode portion includes a polymer electrolyte membrane, an anode electrode formed on a first surface of the polymer electrolyte membrane, and a cathode electrode formed on a second surface of the polymer electrolyte membrane. One of the pair of gas diffusion layers is in contact with an anode surface of the electrode portion at which the anode electrode is disposed, and the other is in contact with a cathode surface of the electrode portion at which the cathode electrode is disposed. The separators sandwich the electrode membrane assembly from respective the anode surface and the cathode surface. The electrode membrane assembly and each separator are adhered to each other by a plurality of resin portions made of a resin which at least partially contains fibers. At least a part of each gas diffusion layer is respectively impregnated with the plurality of resin portions.
Abstract:
A flow battery stack includes an inlet manifold, an outlet manifold and a plurality of flow battery cells. The inlet and outlet manifolds each have first and second passages. The first and second passages in at least one of the inlet and outlet manifolds are tortuous. Each flow battery cell includes a separator arranged between a first electrode layer and a second electrode layer. The flow battery cells are axially connected between the inlet manifold and the outlet manifold such that a first solution having a first reversible redox couple reactant is directed from the inlet first passage through the flow battery cells, wetting the first electrode layers, to the outlet first passage.
Abstract:
In order to achieve cost reduction for fuel cell stacks, gaskets (1 (2)) for a fuel cell are formed integrally by a rubber-like elastic material in the outer periphery of GLDs (3 (4)), which are interposed between separators (6 (7)) and an MEA (5), and are in close contact with the separators (6 (7)). On the surfaces of these gaskets (1 (2)) facing the separators (6 (7)), a gas lead-in groove (1 b) is formed extending such that manifold holes (1 a (2a)) provided in these gaskets (1 (2)) and a gas reaction area (10A) formed by the MEA (5) are communicated to each other. This gas lead-in groove (1 b) can be formed at the same time as the forming of the gaskets (1 (2)) by a rubber-like elastic material, and a gas lead-in groove need not be formed on the separator (6 (7)) side; therefore, costs can be reduced.