A separator for a fuel cell includes a facing surface configured to face a power generating unit of the fuel cell. Groove passages and ribs that protrude toward the power generating unit are provided on the facing surface. At least one of the ribs includes at least one recess in a center of the rib in an arrangement direction of the groove passages. The recess includes a bottom surface, which faces the power generating unit, and two inner side surfaces, which rise from opposite ends in the arrangement direction of the bottom surface. The two inner side surfaces are inclined such that a given point on each inner side surface separates further away from the bottom surface in the arrangement direction as that point approaches the power generating unit in a direction in which the power generating unit and the separator face each other.

A fuel cell system includes: a supply flow path configured to supply reactant gas; a first branch flow path branching off from an outlet end of the supply flow path and configured to guide the reactant gas to a first fuel cell stack; a second branch flow path branching off from the outlet end of the supply flow path and configured to communicate with the first branch flow path and guide the reactant gas to a second fuel cell stack; and an inlet area change part disposed in a boundary zone between the first branch flow path and the second branch flow path and configured to selectively change inlet areas of the first and second branch flow paths. Efficiency in discharging condensate water is increased and performance and operational efficiency are improved.

The present invention provides: a laminate for a gasket of a fuel cell, the laminate including a heat seal layer, having excellent moisture and heat resistance, and being suitable for a gasket of a fuel cell; a gasket; a membrane electrode junction including the gasket; and a fuel cell. A laminate includes a base material and a heat seal layer arranged on the base material. The heat seal layer is a reaction product of a heat sealant containing an amorphous polyester polyol (A), an epoxy resin (B), and an isocyanate compound (C). The amorphous polyester polyol (A) is a reaction product of a polyvalent carboxylic acid and a polyhydric alcohol. An amount of aromatic polyvalent carboxylic acid in the polyvalent carboxylic acid is 95% by mass or more. A glass transition temperature of the amorphous polyester polyol (A) is −20° C. or more and 40° C. or less.

The present invention is a hydrogen exhaust device for fuel cell. A tail gas discharge device for a fuel cell system includes a steam trap, a buffer solenoid valve, a buffer tank and a drain solenoid valve. The steam trap can collect water from wet hydrogen. The buffer tank is a hollow cavity structure such as a tank. Preferably, the steam trap has an upper cover, a main body, a lower cover and a filter. The upper cover has a wet hydrogen inlet, a pressure sensor, a dry hydrogen outlet and a temperature sensor. The lower cover has a liquid storage cavity and a filter support part. The filter has a filter filler and a filter intake channel.

The presently disclosed subject matter relates to devices, systems, and methods of producing an improved fluid flow assembly and liquid/gas diffusion layer in solid polymer electrolyte electrochemical cells. In one aspect, a fluid flow assembly for a polymer electrolyte water electrolyzer includes a flow field having an inlet, an outlet, and a plurality of discrete lands arranged within the flow field. A liquid/gas diffusion layer is positioned in communication with the flow field between the inlet and the outlet, the liquid/gas diffusion layer having a solid substrate through which a plurality of pores is formed. The disclosed bipolar plate flow field and liquid/gas diffusion layer could work together or separately with other types of porous transport layers or bipolar plates to enhance the water/gas transport. In these configurations, the lands can be arranged and configured such that the plurality of pores are substantially unobstructed by the lands.

The presently disclosed subject matter relates to devices, systems, and methods for fabricating a solid polymer electrolyte electrode assembly are provided. One or more electrode for a solid polymer electrolyte electrode assembly includes a porous substrate configured as a liquid/gas diffusion layer and an ionomer-free catalyst coated on the substrate.

A sheet attaching apparatus includes a gripping mechanism that grips one end portion, in a longitudinal direction, of a first sheet that has been drawn out from a first supply roll; a moving mechanism that allows the first sheet to be attached to a second sheet by moving the gripping mechanism to cause the first sheet to approach and contact the second sheet that passes through an attaching portion provided in a feeding path; and a releasing mechanism that releases a grip of the gripping mechanism on the first sheet, after the first sheet has contacted the second sheet.

A system is described that is capable of operating as an energy conversion system that functions as a fuel cell and generates electrical current from a fuel or fuels, or as a reactor for conversion of starter materials into more complex molecules through ion-ion and ion-molecules and which may preferably be adapted to operate as a gas to liquid (GTL) process. The system ionises at least one fuel or starter material and manipulates, selects and transports ions for reaction by means of suitable electrostatic or electrodynamic ion guides, filters or drift tubes. The system of the present application replaces the electrolyte, catalyst and/or membrane found in classic fuel cells or GTL processes with an electrostatic or electrodynamic ion manipulation region such as an ion guide, analyser, drift tube or filter.

A catalyst layer comprising an interface to a polyelectrolyte membrane, the catalyst layer includes a layer forming material, which includes a catalytic substance, a conductive carrier which supports the catalytic substance, a polyelectrolyte, and a fibrous material, and a plurality of pores which contain no layer forming material. A pore area ratio which is a total area ratio of the plurality of pores to an area of a cross-section orthogonal to the interface is 25.0% or more and 35.0% or less in a cross-sectional image captured by a scanning electron microscope.

Disclosed are membrane electrode assemblies having a cathode layer comprising a carbon oxide reduction catalyst that promotes reduction of a carbon oxide; an anode layer comprising a catalyst that promotes oxidation of a water; a polymer electrolyte membrane (PEM) layer disposed between, and in contact with, the cathode layer and the anode layer; and a salt having a concentration of at least about 10 uM in at least a portion of the MEA.