A clad porous metal substrate for use in a metal-supported electrochemical cell, wherein a metal support layer of defined porosity is clad on top and bottom sides with a layer containing a metal and/or a metal oxide. A metal-supported electrochemical half-cell and a metal-supported electrochemical cell are also described.

A clad porous metal substrate for use in a metal-supported electrochemical cell, wherein a metal support layer of defined porosity is clad on top and bottom sides with a layer containing a metal and/or a metal oxide. A metal-supported electrochemical half-cell and a metal-supported electrochemical cell are also described.

A fuel battery includes a membrane-electrode assembly including a first catalyst layer and a first gas diffusion layer stacked on a first surface of a polymer electrolyte membrane, and a second catalyst layer and a second gas diffusion layer stacked on a second surface of the polymer electrolyte membrane. The membrane-electrode assembly is interposed between a first separator and a second separator. The first separator includes a rib and a groove on a surface that is in contact with the first gas diffusion layer, the rib and the groove defining a gas flow path through which a reaction gas is to flow. A thickness of the first gas diffusion layer is defined as h, and a width of a portion of the rib that is in contact with the first gas diffusion layer is defined as Rw such that 0.29 Rw≤h≤0.55 Rw is satisfied.

A membrane electrode assembly for a fuel cell includes a catalyst layer having a first main surface and a second main surface, a gas diffusion layer disposed on a side of the first main surface, and an electrolyte membrane disposed on a side of the second main surface, wherein the gas diffusion layer includes a conductive material and a polymer resin, the conductive material comprises a fibrous carbon material, an average fiber diameter D of the fibrous carbon material is equal to or less than 25% of a thickness T of the catalyst layer, and in a cross section in a thickness direction of the catalyst layer, an arithmetic mean roughness Ra1 of the first main surface and an arithmetic mean roughness Ra2 of the second main surface satisfies the relation, Ra1>Ra2.

A bipolar plate for a proton exchange membrane fuel cell includes a laminate of carbon fiber reinforced plastic (CFRP) with a first outer ply. The CFRP includes a resin and carbon fibers. The first outer ply is arranged at a first lateral surface of the laminate, wherein the laminate includes a first plurality of carbon nanotubes (CNTs). The first outer ply includes a first groove, wherein the first groove is configured to define a first gas diffusion channel. At least some of the first plurality of CNTs extend through the first outer ply in a direction transversely to the first lateral surface of the laminate.

A fuel cell plate for distributing a reactant at an electrode or a gas diffusion layer of a fuel cell has a plate body in which at least one flow field is incorporated, comprising at least one duct. The plate body has hygroscopic and electrically conductive properties.

A composite for a porous transport layer may include a particulate substrate including at least one selected from a group consisting of an oxide of a first metal and a second metal, and nanoparticles of a third metal formed on a surface of the particulate substrate, a sintered body thereof, and a method for preparing the same.

The objective of the present invention is to provide a method which is for producing a gas diffusion electrode substrate having a high conductivity and a chemical resistance, and by which an increase in production cost can be suppressed. The present invention is a method for producing a gas diffusion electrode substrate in which a microporous layer is formed in a conductive porous body formed by bonding carbon fibers to each other by means of a cured product of a binder resin, the method having, in the following order: a binder resin impregnation step in which a carbon fiber structure is impregnated with a binder resin composition to obtain a pre-impregnated body; a coating step in which the surface of the pre-impregnated body is coated with a microporous layer coating solution; and a heat treatment step in which the pre-impregnated body that has been subjected to the coating step is heat-treated at a temperature of at least 200° C., wherein the binder resin composition is a liquid composition including a binder resin and a carbon powder, the binder resin being a thermosetting resin, and the method does not have a step for heat-treating the pre-impregnated body at a temperature of at least 200° C., between the binder resin impregnation step and the heat treatment step.

The objective of the present invention is to provide a method which is for producing a gas diffusion electrode substrate having a high conductivity and a chemical resistance, and by which an increase in production cost can be suppressed. The present invention is a method for producing a gas diffusion electrode substrate in which a microporous layer is formed in a conductive porous body formed by bonding carbon fibers to each other by means of a cured product of a binder resin, the method having, in the following order: a binder resin impregnation step in which a carbon fiber structure is impregnated with a binder resin composition to obtain a pre-impregnated body; a coating step in which the surface of the pre-impregnated body is coated with a microporous layer coating solution; and a heat treatment step in which the pre-impregnated body that has been subjected to the coating step is heat-treated at a temperature of at least 200° C., wherein the binder resin composition is a liquid composition including a binder resin and a carbon powder, the binder resin being a thermosetting resin, and the method does not have a step for heat-treating the pre-impregnated body at a temperature of at least 200° C., between the binder resin impregnation step and the heat treatment step.

The present invention is directed to a rechargeable electrochemical device including a first electrode assembly and a second electrode assembly spaced-apart from the first electrode assembly, a membrane arranged between the first electrode assembly and the second electrode assembly, a first transport plate arranged on the first electrode assembly and a second transport plate arranged on the second electrode assembly, an electrolyte disposed in the first electrode assembly and the second electrode assembly, and a vapor-phase hydrogen carrier in the first transport plate arranged on the first electrode assembly or in the second transport plate arranged on the second electrode assembly; a method for using a rechargeable electrochemical device; and a method for making a rechargeable electrochemical device.