Abstract: A water-repellent layer for fuel cell contains a water-repellent material and a hydrogen peroxide decomposition catalyst. A mass ratio of the hydrogen peroxide decomposition catalyst to the water-repellent material is between 5 mass percent and 20 mass percent, inclusive.

Abstract: An inspection device 20 for inspecting a workpiece 100 having a stepped portion 115, comprises: a pair of electrode plates 220, 230 for nipping the workpiece 100 therebetween and applying voltage to the workpiece 100, the pair of electrode plates 220, 230 including a first electrode plate 220 to be disposed on the stepped portion side 115 and a second electrode plate 230 to be disposed on the opposite side from the stepped portion 115 of the workpiece 100; and a heat transferring member 240 to be disposed so as not to create a gap between the stepped portion 115 and the first electrode plate 220.

Abstract: There is provided a method of manufacturing an electrode catalyst layer for fuel cell. This manufacturing method comprises: (a) separating an ionomer solution by centrifugation into a supernatant that includes only an ionomer as a low molecular-weight component in the ionomer solution and a sediment including an ionomer as a high molecular-weight component having a higher molecular weight than that of the low molecular-weight component included in the supernatant; (b) using the ionomer included in the sediment as an ionomer for electrode catalyst layer and producing a catalyst ink that includes catalyst-supported particles with a catalyst metal supported thereon, a solvent and the ionomer for electrode catalyst layer; and (c) using the catalyst ink to form an electrode catalyst layer.

Abstract: A membrane electrode assembly for use in a fuel cell battery includes: an electrolyte membrane; an anode catalyst layer formed on a first surface of the electrolyte membrane; a cathode catalyst layer formed on a second surface of the electrolyte membrane; an anode gas diffusion layer stacked on the anode catalyst layer; and a cathode gas diffusion layer stacked on the cathode catalyst layer. The anode catalyst layer, the cathode catalyst layer, the anode gas diffusion layer, and the cathode gas diffusion layer have the same thermal insulation performance per thickness. The membrane electrode assembly satisfies all relations of T1+T3<T2+T4, T1<T2, and T3>T4 where thicknesses of the anode catalyst layer, the cathode catalyst layer, the anode gas diffusion layer, and the cathode gas diffusion layer in a stacking direction are defined as T1, T2, T3, and T4, respectively.

Abstract: A manufacturing method of a fuel cell module includes: forming an outer divided body having a frame shape and formed from an uncrosslinked item of solid rubber having adhesiveness in a seal member arrangement portion of a separator to produce an outer temporary assembly, and forming an inner divided body having a frame shape and formed from an uncrosslinked item of solid rubber in a peripheral edge portion of an electrode member to produce an inner temporary assembly; fitting the inner temporary assembly into a frame of the outer temporary assembly to produce a cell assembly temporary assembly; arranging a cell assembly stack, in which a plurality of the cell assembly temporary assemblies are stacked, in a forming die; and pressurizing and heating the forming die to crosslink the uncrosslinked item

Abstract: A manufacturing method of a fuel cell module includes: forming an outer divided body having a frame shape and formed from an uncrosslinked item of solid rubber having adhesiveness in a seal member arrangement portion of a separator to produce an outer temporary assembly, and forming an inner divided body having a frame shape and formed from an uncrosslinked item of solid rubber in a peripheral edge portion of an electrode member to produce an inner temporary assembly fitting the inner temporary assembly into a frame of the outer temporary assembly to produce a cell assembly temporary assembly; arranging a cell assembly stack, in which a plurality of the cell assembly temporary assemblies are stacked, in a forming die; and pressurizing and heating the forming die to crosslink the uncrosslinked item.

Abstract: A fuel cell includes: a membrane electrode assembly provided with an electrolyte membrane and gas diffusion electrodes attached to both sides of the electrolyte membrane; separators supporting the membrane electrode assembly from both sides thereof; a gas flow path forming member disposed between the separator and the gas diffusion electrode to form gas flow path for supplying reactant gas for power generation in the fuel cell to the gas diffusion electrode; and an elastic member disposed between the separator and the gas flow path forming member and having an elastic modulus which is lower than that of the gas flow path forming member.

Abstract: The membrane electrode assembly 100 has an electrolyte layer 10, a catalyst layer 20, and a member 15 impregnated with electrolyte which is arranged between the electrolyte layer 10 and the catalyst layer 20. At least part of the peripheral edge portion of the member 15 extends the outside the peripheral edge portions of the electrolyte layer and the catalyst layer 20. With this kind of constitution, it is possible to easily separate the electrolyte layer 10 or the catalyst layer 20 from the member 15 from the extended portion of the member 15. Consequently, it is possible to easily replace the electrolyte layer 10 and the catalyst layer 20.

Abstract: A manufacturing method of a cell assembly for a fuel cell includes: producing an electrode member, a separator, and a seal member preform, which has a frame shape and which is formed from an uncrosslinked item of solid rubber having adhesiveness, in a predetermined shape in advance; arranging the electrode member, the separator, and the seal member preform in a forming die including a pressing member, and closing the forming die while the pressing member is pressing a side of the electrode member that is opposite to the separator in the thickness direction; and pressurizing and heating the forming die to crosslink the uncrosslinked item so that the seal member seals the peripheral edge portion of the electrode member and integrates the electrode member and the separator with each other.

Abstract: A fuel cell includes an electrolyte membrane, a first electrode, a second electrode and a stress suppressing structure. The first electrode is joined to one surface of the electrolyte membrane. The second electrode is joined to an other surface of the electrolyte membrane. The first peripheral section which is at least part of periphery of the first electrode is located on an inner side along a planar direction of the first electrode than respective peripheries of the electrolyte membrane and the second electrode. The stress suppressing structure is configured to suppress concentration of stress on a location along the first peripheral section in the electrolyte membrane.

Abstract: A fuel cell includes a separator and a power generating body. The separator and power generating body are laminated each other. The power generating body is equipped at least with an electrolyte membrane. The fuel cell comprises: a sealing part that seals reaction gas supplied for electrochemical reactions at the fuel cell between the power generating body and the separator at an outer circumference part of the fuel cell, wherein a convex part and a recess are fit together in the sealing part. The convex part is formed projecting in the lamination direction on one of the power generating body and the separator, and the recess is formed recessed in the lamination direction on the other of the power generating body and the separator. At least one of the convex part and the recess is formed with a polymer material that expands with moisture absorption.

Abstract: A fuel cell has multiple cells, the multiple cells including a first cell having a first fuel gas flow path, and a second cell having a second fuel gas flow path and a sensor that measures a specific parameter value relating to a decrease in concentration of fuel gas in the second fuel gas flow path.

Abstract: A fuel cell stack and fuel cell modules that constitute such a fuel cell stack are provided, wherein adhesion of foreign materials to an electrolyte membrane of each fuel cell can be effectively prevented, and highly efficient maintenance is possible by replacing a fuel cell with degraded performance out of the fuel cell stack. A plurality of fuel cells 10 each having a membrane electrode assembly 1, gas-permeable layers 2,3,5,6 on the anode and cathode sides, sandwiching the membrane electrode assembly 1 therebetween, and a separator 7 on at least one of the anode and cathode sides are stacked. A gasket 8 is integrally molded with peripheral edges of the membrane electrode assembly 1 and the gas-permeable layers 2,3,5,6 of each of the stacked cells, whereby a single fuel cell module 100 is formed. Stacking and compressing such modules 100, . . . can form a fuel cell stack.

Abstract: There is provided a technique of preventing degradation of an electrolyte membrane included in a fuel cell. A fuel cell includes a membrane electrode assembly. The membrane electrode assembly is provided as a power generation device where electrodes are arranged on both sides of an electrolyte membrane having proton conductivity. Each of the electrodes has a layered structure of stacking a catalyst layer arranged to support a catalyst and a gas diffusion layer arranged to spread a reactive gas over the entire electrode plane. The outer peripheral edge of the gas diffusion layer is located inward of the outer peripheral edge of the catalyst layer.

Abstract: A fuel cell includes a separator and a power generating body. The separator and power generating body are laminated each other. The power generating body is equipped at least with an electrolyte membrane. The fuel cell comprises: a sealing part that seals reaction gas supplied for electrochemical reactions at the fuel cell between the power generating body and the separator at an outer circumference part of the fuel cell, wherein a convex part and a recess are fit together in the sealing part. The convex part is formed projecting in the lamination direction on one of the power generating body and the separator, and the recess is formed recessed in the lamination direction on the other of the power generating body and the separator. At least one of the convex part and the recess is formed with a polymer material that expands with moisture absorption.

Abstract: The method of manufacturing a fuel cell including stacked unit cell constituent members sandwiched by separators includes the steps of arranging the unit cell constituent member in a first area on a first face of the separator; and forming a seal member made of elastic material such that the seal member is adhered or intimately attached to a second area including the first area on the first face of the separator, and that the seal member is unified with an edge portion of the unit cell constituent member.

Abstract: A membrane electrode assembly according to the invention includes a solid polymer electrolyte membrane and an electrode joined to each of two sides of the solid polymer electrolyte membrane. The solid polymer electrolyte membrane is such that some or all of the protons included in the entire solid polymer electrolyte membrane, a band region, or a non-power generating region are ion exchanged with one or more cations selected from among complex cations, class four alkylammonium cations, and high valence cations. In addition or alternatively, the solid polymer electrolyte membrane includes an organo-metalloxane polymer obtained by impregnating the entire solid polymer electrolyte membrane, the non-power generating region, or the band region with an organo-metalloxane monomer that includes an ammonium cation or a class four ammonium cation at its terminus and then hydrolyzing and polycondensing the organo-metalloxane monomer.

Abstract: The membrane electrode assembly 100 has an electrolyte layer 10, a catalyst layer 20, and a member 15 impregnated with electrolyte which is arranged between the electrolyte layer 10 and the catalyst layer 20. At least part of the peripheral edge portion of the member 15 extends the outside the peripheral edge portions of the electrolyte layer and the catalyst layer 20. With this kind of constitution, it is possible to easily separate the electrolyte layer 10 or the catalyst layer 20 from the member 15 from the extended portion of the member 15. Consequently, it is possible to easily replace the electrolyte layer 10 and the catalyst layer 20.

Abstract: A manufacturing method of a cell assembly for a fuel cell includes: producing an electrode member, a separator, and a seal member preform, which has a frame shape and which is formed from an uncrosslinked item of solid rubber having adhesiveness, in a predetermined shape in advance; arranging the electrode member, the separator, and the seal member preform in a forming die including a pressing member, and closing the forming die while the pressing member is pressing a side of the electrode member that is opposite to the separator in the thickness direction; and pressurizing and heating the forming die to crosslink the uncrosslinked item so that the seal member seals the peripheral edge portion of the electrode member and integrates the electrode member and the separator with each other.

Abstract: A manufacturing method of a fuel cell module includes: forming an outer divided body having a frame shape and formed from an uncrosslinked item of solid rubber having adhesiveness in a seal member arrangement portion of a separator to produce an outer temporary assembly, and forming an inner divided body having a frame shape and formed from an uncrosslinked item of solid rubber in a peripheral edge portion of an electrode member to produce an inner temporary assembly fitting the inner temporary assembly into a frame of the outer temporary assembly to produce a cell assembly temporary assembly; arranging a cell assembly stack, in which a plurality of the cell assembly temporary assemblies are stacked, in a forming die; and pressurizing and heating the forming die to crosslink the uncrosslinked item.