55 results about "Polymer electrolyte fuel cells" patented technology

To improve the mechanical strength of hydrocarbon-based electrolyte membranes. [Solution] An electrolyte membrane 10A comprising a porous membrane 1 and a hydrocarbon-based electrolyte polymer filled in the pores 2 of the porous membrane 1, wherein the porous membrane 1 is formed of a material containing a hydrocarbon-based resin, and the differential permeate flow rate distribution of the porous membrane 1 measured by the bubble point method has a peak in the pore diameter range of 0.01 to 1 μm.

The present invention provides a film that exhibits better slipperiness, maintains sufficient durability under high temperature and high humidity conditions, and has improved mechanical properties compared to a film made solely of PPSU, and a reinforcing member for the electrolyte membrane of a polymer electrolyte fuel cell or polymer electrolyte water electrolysis using this film. [Solution] A film comprising 6 to 94 parts by mass of polyphenylsulfone and 94 to 6 parts by mass of polysulfone, wherein the arithmetic mean height (Sa) of at least one surface is 6.0 to 17.5 nm.

To provide a method for producing templated carbon material having oxidative wear resistance with high carbon yields and good yields, a method for producing a catalyst using the same, a method for producing a catalyst layer for a polymer electrolyte fuel cell, and a method for producing a fuel cell.SOLUTION: The present invention provides a method for producing templated carbon material using a carbon source satisfying the following requirement (A) and a template source satisfying the following requirement (B). The (A) carbon source is a mixture that comprises a low-molecular-weight compound A comprising two or more functional groups A and a low-molecular-weight compound B comprising two or more functional groups B, wherein at least one of the low-molecular-weight compound A and the low-molecular-weight compound B is an aromatic compound, wherein heating can form a chemical bond between the functional group A and the functional group B, forming a polymer compound comprising alternate bonds between the low-molecular-weight compound A and the low-molecular-weight compound B. The (B) template source is at least one selected from oxide, carbonate, sulfate, and hydroxide of magnesium and alkaline-earth metal.SELECTED DRAWING: None

Systems for creating electrodes for polymer electrolyte membrane fuel cells include an XY stage having a heated vacuum table physically coupled to the XY stage. The vacuum table has a working face with a plurality of channels formed therein to communicate vacuum pressure from a port coupled to a vacuum source to the channels. A sheet of perforated heat-conductive material has staggered holes configured to evenly distribute the vacuum pressure from the channels through the perforated sheet. A heat-conductive wire mesh is placed over the perforated sheet, and has openings smaller than the staggered holes such that a membrane material placed on the wire mesh is not deformed by the vacuum pressure. A nanopipette or micropipette coupled to a pump is configured to deposit electrode ink onto an exposed surface of the membrane material as the controller device causes the XY stage to move the vacuum table to control deposition of the electrode ink onto the surface of the membrane material.

The present invention provides a film having good slipperiness, sufficiently maintained durability under high temperature and high humidity, and improved mechanical characteristics as compared with a film of PPSU alone, and provides a reinforcing member that is for electrolyte membranes for solid polymer electrolyte fuel cells or solid polymer electrolyte water electrolysis and that uses said film. The present invention relates to a film containing 6-94 mass parts of polyphenylsulfone and 94-6 mass parts of polysulfone, the arithmetic average height (Sa) of at least one surface being 6.0-17.5 nm.

An electrode catalyst layer for a polymer electrolyte fuel cell includes catalyst particles, a polymer electrolyte, and a fibrous material. The catalyst particles each include an electroconductive support, a plurality of metal particles supported on the electroconductive support, an ionic liquid in contact with a surface of the metal particles and electroconductive support, and an inorganic film covering a surface of the metal particles and electroconductive support via the ionic liquid. The inorganic film contains Si. The ratio of the number of silicon atoms to the total number of atoms of carbon, nitrogen, oxygen, fluorine, silicon, sulfur, and platinum elements in the electrode catalyst layer, as obtained by energy dispersive X-ray spectroscopy, is 0.5 at % or more and 10 at % or less.

To provide an electrode catalyst layer, a membrane electrode assembly, a polymer electrolyte fuel cell, and a method for manufacturing an electrode catalyst layer that can increase proton conductivity under standard conditions and high-humidity conditions with a simple configuration.SOLUTION: An electrode catalyst layer includes a conductive support 21 supporting a catalyst material 22, a polymer electrolyte 23, and a fibrous material 24 that is an electron-conductive fiber. The fibrous material 24 has a surface with irregularities 25, and the depth peak of the distribution of the depth of the irregularities is 10 nm or more and 50 nm or less, the width peak of the distribution of the width of the irregularities is 100 nm or more and 300 nm or less, and the product of the depth peak and the width peak is 10,000 or less.SELECTED DRAWING: Figure 4

To suppress a decrease in power generation performance in a dry environment in a fuel cell system equipped with an open cathode polymer electrolyte fuel cell.SOLUTION: A fuel cell system includes an open-cathode polymer electrolyte fuel cell including an anode catalyst layer and a cathode catalyst layer, and a hydrogen gas supply device for supplying hydrogen gas to the anode catalyst layer. The cathode catalyst layer includes tin oxide-based particles as a cathode catalyst support. The fuel cell system may further include a humidifier for humidifying the hydrogen gas and / or a fan for introducing outside air to the cathode catalyst layer, wherein the humidifier and / or the fan are provided between the hydrogen gas supply device and the anode catalyst layer.SELECTED DRAWING: Figure 1

The present invention provides a film electrode assembly with high carbon corrosion resistance. [Solution] The membrane electrode assembly comprises an anode-side electrode catalyst layer, a solid polymer electrolyte membrane, and a cathode-side electrode catalyst layer in this order. The anode-side electrode catalyst layer and the cathode-side electrode catalyst layer each contain catalyst particles, a carbon support carrying the catalyst particles, and a polymer electrolyte, and the volume density of the anode-side electrode catalyst layer is smaller than the volume density of the cathode-side electrode catalyst layer.

The present invention provides: a novel additive containing an ionic liquid that can be used for a composition for forming a cathode catalyst layer of a polymer electrolyte fuel cell; a novel composition for forming a cathode catalyst; and a novel cathode catalyst layer formed using the same.　The present invention relates to a composition for forming a cathode catalyst layer of a polymer electrolyte fuel cell, the composition containing an ionic liquid represented by formula (1). In the formula, X represents an atomic group containing a nitrogen atom or a phosphorus atom; Y represents a hydrogen atom, a carboxy group, or a sulfonic acid group; Z-represents a hydrogen sulfate anion, a trifluoromethanesulfonate anion, a bis(trifluoromethylsulfonyl)imide anion, a halogen anion, a tetrafluoroborate anion, a hexafluorophosphate anion, a bis(fluorosulfonyl)imide anion, or a nonafluorobutanesulfonate anion; and n represents an integer of 2-4.

The present invention addresses the problem of suppressing any lowering of durability in a carrier of a catalyst layer. This electroconductive titanium oxide has an electroconductivity of 0.1 S / cm or greater as measured under a pressure of 10 MPa.

A gasket member for a polymer electrolyte fuel cell is provided, which has excellent resistance to hydrolysis in a high-temperature environment. [Solution] A gasket component for a polymer electrolyte fuel cell, which is composed of a laminate having at least a base layer and adhesive layers arranged on both sides of the base layer, and which has a breaking elongation retention rate of 60% or more after being left standing in water at 120°C for 300 hours.

The purpose of the present invention is to provide an electrode catalyst layer, a membrane electrode assembly, and a solid polymer fuel cell, which are capable of improving material transport properties and proton conductivity in the electrode catalyst layer, and which are capable of exhibiting high power generation performance over the long term and have good durability. An electrode catalyst layer (10) is an electrode catalyst layer used in a solid polymer fuel cell, and includes: a catalyst material (12); a conductive carrier (13) that supports the catalyst material (12); a polymer electrolyte (14); and a fibrous material (15), wherein the fibrous material (15) contains a substance having a nitrogen atom, and is included in an amount of 1-12 wt% (exclusive of 12) in the electrode catalyst layer (10).

The C / SiC composite particle contains a porous carbon particle and SiC particles distributed on the inner wall surface of the pores of the porous carbon particle. Such a C / SiC composite particle can be obtained by: producing a silica / carbon composite A by causing carbon to be deposited within the pores of a porous silica particle; producing a silica / carbon composite B by removing a portion of the silica from the silica / carbon composite A; heat-treating the silica / carbon composite B to graphitize the carbon; and simultaneously generating SiC. The electrode catalyst contains C / SiC composite particles and catalyst particles supported on the surface of the C / SiC composite particles. Furthermore, a polymer electrolyte fuel cell contains such an electrode catalyst as a cathode catalyst or an anode catalyst.

Disclosed is a carbon material for a catalyst carrier of a polymer electrolyte fuel cell, the carbon material being composed of porous activated carbon black that satisfies requirements (A) to (C).　(A) The volume of pores having a pore diameter of 2 nm to 6 nm inclusive is 0.1 mL / g to 0.7 mL / g inclusive.　(B) The ratio (OSA / SBET) of the outside specific surface area OSA to the BET specific surface area SBET is 0.1 to 0.5 inclusive.　(C) Lc (002) obtained from the line width of the (002) diffraction line is 1.6 nm to 4.0 nm inclusive.

The present invention provides an electrode catalyst layer, a membrane electrode assembly, and a polymer electrolyte fuel cell that can enhance power generation performance over a wide load range by suppressing catalyst poisoning and improving proton transport using ionomers. [Solution] The electrode catalyst layer 12C of the air electrode includes a catalyst support 20 which is a porous carbon support 21 supporting a catalyst substance 23, and a polymer electrolyte 24, and the ECSA ratio, which is the ratio of ECSA at a relative humidity of 30% to ECSA at a relative humidity of 100%, is 0.55 or more and 0.65 or less. The catalyst support 20 includes a first catalyst support 20a which has an ECSA ratio of 0.5 or less when used alone as the catalyst support 20 included in the electrode catalyst layer 12C, and a second catalyst support 20b which has an ECSA ratio of 0.7 or more when used alone as the catalyst support 20 included in the electrode catalyst layer 12C.

The present invention provides: a carbon material for a catalyst support of a polymer electrolyte fuel cell, said carbon material being composed of porous activated carbon black and satisfying the following requirements (A) to (D); a catalyst layer using the same; and a fuel cell.　(A) The adsorption amount at a relative pressure of 0.1 is 100 mL / g to 250 mL / g.　(B) The nitrogen adsorption amount for pores having a pore diameter of 2 nm to 6 nm as obtained by subtracting the nitrogen adsorption amount at a relative pressure of 0.218 from the nitrogen adsorption amount at a relative pressure of 0.671 is 50 mL / g to 300 mL / g.　(C) The difference obtained by subtracting the adsorption amount at a relative pressure of 0.8 according to an adsorption isotherm from the adsorption amount at a relative pressure of 0.8 according to a desorption isotherm is 50 mL / g or less.　(D) The line width of a peak appearing near 1580 cm-1 in a Raman spectrum is 70 cm-1 to 84 cm-1.

The present invention provides an anode catalyst for polymer electrolyte fuel cells that exhibits superior resistance to CO catalyst poisoning and better durability compared to PtRu alloy catalysts. [Solution] The present invention relates to an anode catalyst for a polymer electrolyte fuel cell having catalyst particles for processing a fuel gas containing carbon monoxide (CO). The present invention is characterized by the application of catalyst particles composed of Pt and Ir. PtIr is a more suitable catalyst particle than PtRu, which has been known to have superior CO catalyst toxicity resistance. These catalyst particles include regions on their surface where four or more Ir atoms are adjacent and clustered.

This polymer which has a structure represented by formula (1). (In formula (1), A1 represents a constituent unit expressed by formula (a1), A2 represents a constituent unit expressed by formula (a2), L1 and L2 each independently represent a single bond or the like, n represents an integer of 10 to 100, and * represents an atomic bond. There are two or more kinds of A1 and / or A2, the difference in x in formula (a1) among a plurality of A1 moieties is 3 or less, and the difference in y in formula (a2) among a plurality of A2 moieties is 5 or less.) (In formula (a1), IExG represents an ion exchange group, L3 represents a single bond or the like, x represents an integer of 2 to 10, and * represents an atomic bond.) (In formula (a2), Ar represents an arylene group having no ion exchange group, L4 represents a single bond or the like, y represents an integer of 3 to 20, and * represents an atomic bond.)

The present invention addresses the problem of reducing the aging time of a fuel cell.　In order to solve the above-described problem, a gas diffusion electrode base material product according to the present invention has a sulfuric acid content of 1.1 μg / cm2 or less. In addition, this gas diffusion electrode base material product is incorporated in a polymer electrolyte fuel cell according to the present invention.

Provided is a carbon material for a catalyst carrier in a solid polymer fuel cell, the carbon material comprising porous activated carbon black satisfying requirements (A) to (C). (A) The BET surface area (m2 / g) measured by nitrogen gas adsorption is 400-1200. (B) In a particle size distribution of the accumulated passing amount of particles from small particles to large particles obtained by volume-based particle size using a laser light scattering method, the difference Δ=D95-D5 is 0.35-2.00, where D5 (μm) and D95 (μm) are common logarithm values of particle size for 5% and 95% accumulated passing amounts, respectively, when the total accumulated amount is 100%. (C) In a Raman spectrum obtained by Raman spectroscopy, the full width at half maximum ΔG (cm-1) of G-band in the range of 1560 cm-1 to 1620 cm-1 is 72-90.

Simple membrane electrode and frame assemblies for a solid polymer electrolyte fuel cell stack and improved methods for making them are disclosed which involve the use of a single adhesive layer. Using an appropriate design, the single adhesive layer can provide multiple bonds, including a bond between one of the gas diffusion layers and a catalyst coated membrane assembly, between the catalyst coated portion of the catalyst coated membrane assembly and the frame, and between either the other of the gas diffusion layers and the frame, or between an uncoated portion of the catalyst coated membrane assembly and the frame.

A compound that has good solubility in a polar solvent and when it is used as an electrolyte in a catalyst layer of a polymer electrolyte fuel cell, the polymer electrolyte fuel cell exhibits good power generation characteristics is disclosed. The compound has a structure represented by the following general formula (I)which contains at least one sulfonic acid group.

To provide a method for producing templated carbon material with high carbon yields and good yields, a method for producing a catalyst using the same, a method for producing a catalyst layer for a polymer electrolyte fuel cell, and a method for producing a fuel cell.SOLUTION: The present invention provides a method for producing templated carbon material using a carbon source satisfying the following requirement (A) and a template source satisfying the following requirement (B). The (A) carbon source comprises an aromatic compound that comprises two or more oxygen-containing functional groups and / or two or more nitrogen-containing functional groups, wherein, in a thermogravimetric analysis in an inert atmosphere, it reaches a 5 mass% loss at a temperature T0.05 of 200°C or lower. The (B) template source is at least one selected from oxide, carbonate, sulfate, and hydroxide of magnesium, alkaline-earth metal and aluminum.SELECTED DRAWING: None

The present invention relates to an anode catalyst for polymer electrolyte fuel cells, the anode catalyst having catalyst particles for treating a fuel gas that contains carbon monoxide (CO). The present invention is characterized by applying catalyst particles that are composed of Pt and Ir. PtIr forms catalyst particles that are more suitable than PtRu which has been known to have excellent characteristics with respect to catalyst CO tolerance. The catalyst particles each include a region in which four or more Ir atoms are adjacent to each other and clustered on the surface. It is preferable that the catalyst particles are configured to have an atomic ratio of Pt to Ir (Pt:Ir) of 2:1 to 1:2 inclusive, and it is also preferable that the catalyst particles have an average particle diameter of 40 nm to 100 nm inclusive.

An object is to provide an electrode catalyst layer, a membrane electrode assembly, and a polymer electrolyte fuel cell that can suppress decrease in durability of the membrane electrode assembly and decrease in power generation performance of the polymer electrolyte fuel cell by suppressing crack generation in the electrode catalyst layer. An electrode catalyst layer according to one aspect of the present invention is an electrode catalyst layer including at least: a catalytic substance; aggregates of polymer electrolytes; and polymer electrolyte fibers. In the electrode catalyst layer, an amount of phosphorus and an amount of platinum defined via elemental analysis by energy dispersive X-ray spectroscopy (EDX) satisfy a following equation (1)0<P / Pt≤3.0  Equation (1).

To provide a perfluoropolymer capable of producing an electrolyte membrane excellent in electrical conductivity and mechanical strength under high temperature environment, as well as a liquid composition, a polymer electrolyte membrane, a membrane electrode assembly and a polymer electrolyte fuel cell, obtainable by using the perfluoropolymer. The perfluoropolymer of the present invention contains perfluoromonomer units, does not substantially contain units having a halogen atom other than a fluorine atom, does not substantially contain units having a ring structure, and has acid-type sulfonic acid groups, wherein the perfluoromonomer units contain at least one type of units A selected from the group consisting of perfluoro vinyl ether units and perfluoro allyl ether units; the ion exchange capacity is from 1.4 to 2.5 milliequivalent / gram dry resin; and the storage modulus at 120° C. is at least 60 MPa.

Provided are: a carbon material which is for a catalyst carrier of a polymer electrolyte fuel cell, and which is composed of a porous activated carbon black and satisfies the following requirements (A)-(C); a catalyst layer for a polymer electrolyte fuel cell using the carbon material; and a fuel cell.　(A) A BET specific surface area SBET is 410 m2 / (g) to 1.000 m2 / (g).　(B) A peak intensity ratio ID / IG of a D-band peak intensity ID to a G-band peak intensity IG is 1.2 to 2.2.　(C) A full width at half maximum ΔG of a G band peak is 72 cm-1 to 83 cm-1.

The objective is to provide an electrode catalyst layer that is effective in preventing the destruction of voids in the catalyst layer and catalyst-supported particles due to internal stress during the manufacturing process of membrane electrode assemblies for polymer electrolyte fuel cells. [Solution] An electrode catalyst layer comprising catalyst-supported particles and a polymer electrolyte, wherein the thickness of the electrode catalyst layer is 1 to 20 μm, and the L in the CIE LAB color system measured using a multi-angle spectrophotometer. * a * , and b * However, L * ≥16.0, 0.0≦a * ≤5.0, 0.5 ≤b * The present invention provides an electrode catalyst layer that satisfies ≤10.0.