摘要:
Provided is a membrane electrode assembly for a polymer electrolyte fuel cell which is hard to be unstable in electric power generation even though a change in power generation surroundings, or a change in the humidity conditions in the vicinity of the electrodes occurs, has high initial performance, and suppresses the performance deterioration in a long-term use. The membrane electrode assembly for a polymer electrolyte fuel cell (1) comprises: a proton conductive membrane (2) for conducting protons; electrode catalyst layers (3) arranged at both sides of the proton conductive membrane (2) containing catalyst particles and an electrode electrolyte; and gas diffusion layers (4) arranged on the respective electrode catalyst layers (3), having a porous basic material. Further, intermediate layers (5) each having a thickness of 2-6 μm are included, with noble metallic nanoparticles (51), an electrode electrolyte (52) and carbon powder.
摘要:
An oxygen-containing gas flow field is formed on a surface of a first metal separator. The oxygen-containing gas flow field is connected between an oxygen-containing gas supply passage and an oxygen-containing gas discharge passage. The oxygen-containing gas flow field comprises oxygen-containing gas flow grooves, and ends of the oxygen-containing gas flow grooves are extended outwardly beyond ends of electrode catalyst layer of a membrane electrode assembly, and connected to an inlet buffer and an outlet buffer. When the purging process is performed at the time of stopping operation of the fuel cell, the purging air supplied to the oxygen-containing gas flow field discharges water retained in the electrode catalyst layers from the ends to the outlet buffer.
摘要:
A fuel cell stack includes a stack body, an end separator, a terminal plate, an insulating plate, and an end plate provided at one end of the stack body in a stacking direction. The insulating plate has a recess for accommodating the terminal plate. Further, the insulating plate has a bypass passage connected between a fuel gas supply passage and a fuel gas discharge passage outside the recess for discharging condensed water. An insulating seal member is provided on the end separator to cover the bypass passage. The condensed water flows through an insulated passage formed by the insulating seal member and the bypass passage.
摘要:
Provided are a flame-retardant thermoplastic resin composition comprising 100 parts by weight of a resin mixture of (A) from 50 to 95% by weight of a polycarbonate resin and (B) from 5 to 50% by weight of a styrenic resin, from 0.1 to 10 parts by weight of (C) red phosphorus, and from 5 to 50 parts by weight of (D) talc, and its injection moldings. The composition comprising a polycarbonate resin and a styrenic resin is troubled little by red coloration with red phosphorus therein. The composition can be well molded into pale color or light color moldings. The color tone and the outward appearance of the moldings are both good, and the heat resistance, impact resistance, rigidity and even the flame retardancy of the moldings are much improved. In the composition, red phosphorus is preferably stabilized.
摘要:
Provided are a flame-retardant polycarbonate resin composition having good blow moldability, and blow moldings of the composition having good flame retardancy and having good impact resistance, high mechanical strength and good thermal stability intrinsic to polycarbonate resins. The composition comprises 100 parts by weight of a resin or resin mixture of (A) from 30 to 100% by weight of a polycarbonate resin and (B) from 0 to 70% by weight of a styrenic resin, from 1 to 50 parts by weight of (C) a flame retardant, and from 1 to 20 parts by weight of (D) a methyl methacrylate polymer having a weight-average molecular weight of at least 1,000,000, and optionally contains (E) a fluoro-olefinic resin, (F) a rubber-like elastomer, and (G) an inorganic filler.
摘要:
An electrolyte membrane-electrode structure with a resin frame is provided with: an electrolyte membrane-electrode structure that is provided with an anode-side electrode and a cathode-side electrode, with a solid polymer electrolyte membrane being held therebetween; and a resin frame member that is arranged around the outer periphery of the solid polymer electrolyte membrane. An intermediate layer is continuously arranged: between an outer peripheral end portion of the cathode-side electrode and a first inner peripheral end portion of the resin frame member; on an outer peripheral end portion of the solid polymer electrolyte membrane, said outer peripheral end portion being exposed outside the outer peripheral end portion of the cathode-side electrode; and between an outer peripheral end portion of the anode-side electrode and a second inner peripheral end portion of the resin frame member.
摘要:
There is provided an electrode structure for a polymer electrolyte fuel cell having excellent power generation performance and excellent durability and a method for manufacturing the same. Also provided is a polymer electrolyte fuel cell including the electrode structure and an electrical apparatus and a transport apparatus using the polymer electrolyte fuel cell. The electrode structure includes a polymer electrolyte membrane 2 sandwiched between a pair of electrode catalyst layers 1, 1 containing carbon particles supporting catalyst particles. The polymer electrolyte membrane 2 is made of a sulfonated polyarylene-based polymer. The sulfonated polyarylene-based polymer has an ion exchange capacity in the range of 1.7 to 2.3 meq/g, and the polymer contains a component insoluble in N-methylpyrrolidone in an amount of 70% or less relative to the total amount of the polymer, after the polymer is subjected to heat treatment for exposing it under a constant temperature atmosphere of 12° C. for 200 hours. A catalyst paste containing catalyst particles and a polymer electrolyte is coated on a sheet-like support 6 and dried to form an electrode catalyst layer 1 containing a solvent in an amount in the range of 0.5% or less by weight of the total membrane. The electrode catalyst layers 3, 3 are thermally transferred and joined on both sides of the polymer electrolyte membrane 1.
摘要:
A fuel cell membrane electrode assembly includes an anode electrode catalyst layer, a cathode electrode catalyst layer, and a polymer electrolyte membrane. A ratio of a pore volume occupied by pores with a pore size of 0.1 μm or less is 70% or more in a pore volume occupied by pores with a pore size of 3 μm or less formed in the anode electrode catalyst layer. The polymer electrolyte membrane is sandwiched between the anode electrode catalyst layer and the cathode electrode catalyst layer.
摘要:
A membrane electrode assembly for a polymer electrolyte fuel cell has superior power generation characteristics under low humidity conditions and superior starting characteristics under low temperature conditions. In the membrane electrode assembly for a polymer electrolyte fuel cell in which a polymer electrolyte membrane is disposed between a pair of electrodes containing a catalyst, the polymer electrolyte membrane has a polymer segment A having an ion conductive component and a polymer segment B not having an ion conductive component. Furthermore, in the case in which the polymer electrolyte membrane is immersed in water at 90° C. for 30 minutes, absorbed water which exhibits a thawing temperature of from −30 to 0° C. is in a range from 0.01 to 3.0 g per 1 g of the polymer.
摘要:
There is provided an electrode structure for a polymer electrolyte fuel cell having excellent power generation performance and excellent durability and a method for manufacturing the same. Also provided is a polymer electrolyte fuel cell including the electrode structure and an electrical apparatus and a transport apparatus using the polymer electrolyte fuel cell. The electrode structure includes a polymer electrolyte membrane 2 sandwiched between a pair of electrode catalyst layers 1, 1 containing carbon particles supporting catalyst particles. The polymer electrolyte membrane 2 is made of a sulfonated polyarylene-based polymer. The sulfonated polyarylene-based polymer has an ion exchange capacity in the range of 1.7 to 2.3 meq/g, and the polymer contains a component insoluble in N-methylpyrrolidone in an amount of 70% or less relative to the total amount of the polymer, after the polymer is subjected to heat treatment for exposing it under a constant temperature atmosphere of 12° C. for 200 hours. A catalyst paste containing catalyst particles and a polymer electrolyte is coated on a sheet-like support 6 and dried to form an electrode catalyst layer 1 containing a solvent in an amount in the range of 0.5% or less by weight of the total membrane. The electrode catalyst layers 3, 3 are thermally transferred and joined on both sides of the polymer electrolyte membrane 1.