Abstract:
The invention relates to a fuel cell having an anode-cathode stack (12, 14, 20, 22), which comprises at least one active area layer (10), which is formed comprising a first channel structure (24) having a first and at least one second channel (26) for conducting a first fluid (30) via the at least one active area layer (10) of the anode-cathode stack, and in which a first distributor structure (40) is provided for distributing the first fluid (30) into the first and the at least one second channel (26) of the channel structure (24). The first distributor structure (40) is shaped having a first area region (42, 46) associated with the first channel and having a second area region (44) associated with the second channel, and the two area regions (42/45, 44) are shaped having a different flow resistance for the first fluid (40) distributed in the first distributor structure (40), wherein the different flow resistance is achieved by different flow channel heights.
Abstract:
The present invention concerns electrode catalysts used in fuel cells, such as proton exchange membrane (PEM) fuel cells. The invention is related to the reduction of the noble metal content and the improvement of the catalytic efficiency by low level substitution of the noble metal to provide new and innovative catalyst compositions in fuel cell electrodes. The novel electrode catalysts of the invention comprise a noble metal selected from Pt and Pd alloyed with an alkaline earth metal.
Abstract:
[Problems to be Solved] To provide a membrane electrode assembly where an external leak of a fuel gas and an oxidant gas supplied to a catalyst layer, is suppressed. [Means to Solve the Problems] A membrane electrode assembly includes an electrolyte membrane 30, and frame-shaped first and second gaskets 40, 60 disposed on both surfaces of the electrolyte membrane 30. The first and second gaskets 40, 60 have overlapping portions 42, 62 which are positioned at a peripheral edge 31 of the electrolyte membrane 30 and face to the electrolyte membrane 30, and bonding portions 52, 72 which are positioned outside of the peripheral edge 31 and bonded each other. The overlapping portions 42, 62 and the bonding portions 52, 72 have through holes 48, 68, 58, and 78 which extend in a thickness direction T of the electrolyte membrane 30. An aperture ratio of the through holes 48, 68 of the overlapping portions 42, 62 is greater than an aperture ratio of the through holes 58, 78 of the bonding portions 52, 72.
Abstract:
The invention relates to a colloidal electrolyte composition comprising a polyelectrolyte selected from one or more cationic polymers, a particulate phase forming a colloidal dispersion, and a binder system able to form a cross-linked network upon curing the electrolyte composition. Also, the invention relates to a method of preparation the colloidal electrolyte composition, to an electrochemical cell and to a method of preparation the electrochemical cell.
Abstract:
[Problem] To provide a fuel battery cell that can prevent a bonded region between a membrane electrode assembly and a frame from breaking even when surface pressure acts on the membrane electrode assembly of which the periphery is held in the frame. [Means For Solving Problem] A fuel battery cell (1) has a membrane electrode assembly (10), a frame (20), a pair of separators (30), and support members (40). The membrane electrode assembly is formed with an anode (12) and a cathode (13) bonded so as to face an electrolyte membrane (11). The frame holds the periphery of the membrane electrode assembly. The pair of separators sandwich the frame holding the membrane electrode assembly. The support members protrude along an edge part of the frame so as to pass beyond the frame and support the membrane electrode assembly.
Abstract:
An object of the present invention is to provide a redox flow secondary battery being low in the electric resistance and excellent in the current efficiency as well, and further having the durability.The present invention relates to an electrolyte membrane for a redox flow secondary battery, the electrolyte membrane containing an ion-exchange resin composition containing a fluorine-based polyelectrolyte polymer, and having an ion cluster diameter of 1.00 to 2.95 nm as measured in water at 25°C by a small angle X-ray method, and to a redox flow secondary battery using the electrolyte membrane.
Abstract:
A separator for fuel cell includes a corrugated portion formed to have a corrugated cross section where a first groove that is concave to a first surface to form a flow path for a first fluid on the first surface and a second groove that is concave to a second surface opposite to the first surface to form a flow path for a second fluid on the second surface are arranged alternately and repeatedly. Each of the second grooves has at least one shallower groove section formed to have a less depth from the second surface than depth of a remaining groove section and provided to form a communication flow channel on the first surface side, which is arranged to communicate between two flow path spaces for the first fluid that are adjacent to each other across the shallower groove section.