摘要:
A fuel gas inlet is provided at an outer circumferential edge portion of a second separator. First fuel gas flow passage grooves for supplying a fuel gas to an anode electrode are formed on a side of a surface of the second separator. First fuel gas connecting flow passages, which make communication between the fuel gas inlet and the first fuel gas flow passage grooves, include flow passage lo grooves which are provided on a side of a surface, and through-holes which penetrate through the second separator to make communication with the first fuel gas flow passage grooves. Accordingly, excellent sealing performance is ensured with a simple structure, and it is possible to realize a thin-walled fuel cell.
摘要:
A fuel gas inlet is provided at an outer circumferential edge portion of a second separator. First fuel gas flow passage grooves for supplying a fuel gas to an anode electrode are formed on a side of a surface of the second separator. First fuel gas connecting flow passages, which make communication between the fuel gas inlet and the first fuel gas flow passage grooves, include flow passage grooves which are provided on a side of a surface, and through-holes which penetrate through the second separator to make communication with the first fuel gas flow passage grooves. Accordingly, excellent sealing performance is ensured with a simple structure, and it is possible to realize a thin-walled fuel cell.
摘要:
A cell assembly (10) includes a first unit cell (12) and a second unit cell (14). The first unit cell (12) and the second unit cell (14) are juxtaposed such that electrode surfaces of the first unit cell (12) and electrode surfaces of the second unit cell (14) are aligned in parallel with each other. An oxygen-containing gas flow passage (32) includes a first oxygen-containing gas passage (38) in the first unit cell (12), an oxygen-containing gas connection passage (40) in a connection passage member (16), and a second oxygen-containing gas passage (42) in the second unit cell (14). The first oxygen-containing gas passage (38), the oxygen-containing gas connection passage (40), and the second oxygen-containing gas passage (42) are connected serially from the first unit cell (12) to the second unit cell (14).
摘要:
A cell assembly (10) includes a first unit cell (12) and a second unit cell (14). The first unit cell (12) and the second unit cell (14) are juxtaposed such that electrode surfaces of the first unit cell (12) and electrode surfaces of the second unit cell (14) are aligned in parallel with each other. An oxygen-containing gas flow passage (32) includes a first oxygen-containing gas passage (38) in the first unit cell (12), an oxygen-containing gas connection passage (40) in a connection passage member (16), and a second oxygen-containing gas passage (42) in the second unit cell (14). The first oxygen-containing gas passage (38), the oxygen-containing gas connection passage (40), and the second oxygen-containing gas passage (42) are connected serially from the first unit cell (12) to the second unit cell (14).
摘要:
An assembling operation of a fuel cell is effectively simplified. With the simple and economical structure, the desired sealing function is achieved. The fuel cell (10) includes a membrane electrode assembly (14) and first and second metal separators (16, 18) sandwiching the membrane electrode assembly (14). Connection channels (28a, 28b) are provided on the first metal separator (16). The connection channels (28a, 28b) connect the oxygen-containing gas supply passage (20a) and the oxygen-containing gas discharge passage (20b) to the oxygen-containing gas flow field (26). The membrane electrode assembly (14) has first overlapping portions (66a, 66b) overlapped on the connection channels (28a, 28b) for sealing the connection channels (28a, 28b). The first overlapping portions (66a, 66b) comprise, in effect, a gas diffusion layer.
摘要:
An assembling operation of a fuel cell is effectively simplified. With the simple and economical structure, the desired sealing function is achieved. The fuel cell includes a membrane electrode assembly and first and second metal separators sandwiching the membrane electrode assembly. Connection channels are provided on the first metal separator. The connection channels connect the oxygen-containing gas supply passage and the oxygen-containing gas discharge passage to the oxygen-containing gas flow field. The membrane electrode assembly has first overlapping portions overlapped on the connection channels for sealing the connection channels. The first overlapping portions comprise, in effect, a gas diffusion layer.
摘要:
A membrane-electrode structure having an electrode catalyst layer adhered to a diffusion electrode, wherein the structure is manufactured by applying a catalyst paste onto a sheet substrate, and then dried to form a plurality of electrode catalyst layers. The electrode catalyst layers are thermally transferred onto each side of a polymer electrolyte membrane to form a laminated body. A first slurry is applied on a carbon substrate layer, and dried to form a water-repellent layer, and then, a second slurry is applied on the water-repellent layer, and dried to form a hydrophilic layer to form a diffusion electrode. The diffusion electrode is then laminated on the electrode catalyst layer through the hydrophilic layer, and then pressed under heating to integrate the laminated body and the diffusion electrode.
摘要:
A membrane electrode assembly for a polymer electrolyte fuel cell has, as basic components, a polymer electrolyte membrane, a pair of electrode layers which sandwich the polymer electrolyte membrane, and a pair of gas-diffusion layers disposed outside the respective electrode layers. Electric medium layers are respectively provided between the electrode layer and the gas-diffusion layer at one side and between the electric layer and the gas-diffusion layer at the other side. Each of the electric medium layers is constituted of a plurality of carbon whiskers, a plurality of carbon particles and a binder including an electrolyte material. A content GW of the carbon whiskers in each of the electric medium layers is set at 10 wt %≦GW≦25 wt %. Thus, the membrane electrode assembly for the polymer electrolyte fuel cell can keep a high power generating performance by reducing the contact resistance between the gas-diffusion layers and the electrode layers.
摘要:
This invention relates to pharmaceutical compositions for the treatment of skin diseases which comprises as an active ingredient vitamin A esters of .alpha.-tocopherol.
摘要:
The present invention provides an electrode catalyst layer comprising catalyst particles, an ion exchange resin and a water repellent agent. The water repellent agent contains (A) a fluorine-containing copolymer having a structure unit derived from a polyfluoroalkyl-containing (meth)acrylate and/or (B) a fluorine-containing copolymer having a structural unit represented by derived from a fluorine-containing olefin monomer and a structure unit represented derived from a vinyl ether monomer. The electrode catalyst layer contains 0.1 to 20% by weight of the water repellant agent. The electrode catalyst layer exhibits excellent balance between water retention and drainage in an electrode, good power generation performance under any of low humidity and high humidity conditions, and also excellent durability in power generation.