A fuel cell electrode comprises a three-dimensional porous composite structure comprising a porous structure comprising a plurality of metal ligaments and a plurality of pores; and at least one carbon nanotube structure embedded in the porous structure and comprising a plurality of carbon nanotubes joined end to end by van der Waals attractive force, wherein the plurality of carbon nanotubes are arranged along a same direction.

The present invention provides a method for efficiently producing a gas diffusion electrode substrate having excellent adhesion property. This method is a method for producing a gas diffusion electrode substrate having a porous layer on at least one surface of an electroconductive porous substrate which includes the steps of a coating step wherein a coating solution containing electroconductive particles, a water-repellant material, a dispersion medium, and a surfactant is coated on the electroconductive porous substrate, a drying step wherein heating is conducted at a temperature lower than the temperature of a first heat treatment step, the first heat treatment step wherein the heating is conducted at a temperature lower than the melting point of the water-repellant material, and a second heat treatment step wherein the heating is conducted at a temperature higher than the melting point of the water-repellant material, wherein the coating solution contains at least 0.09 part by weight and up to 0.27 part by weight of the water-repellant material in relation to 1 part by weight of the electroconductive particles, the first heat treatment step is conducted by heating for a time of 0.2 minute to 3.0 minutes, and the second heat treatment step is conducted by heating for a time of up to 2.9 minutes.

A metal-air battery includes an anode portion including a metal; a cathode portion including a porous layer, wherein the porous layer includes a reduced non-stacked graphene oxide; and an electrolyte disposed between the anode portion and the cathode portion.

The present specification relates to a method for manufacturing an electrode, an electrode manufactured by the same, an electrode structure including the electrode, a fuel cell or a metal-air secondary battery including the electrode, a battery module including the fuel cell or the metal-air secondary battery, and a composition for manufacturing an electrode.

An electrochemical reaction unit cell including an electrolyte layer containing Zr, an anode disposed on one side of the electrolyte layer in a first direction, a cathode containing Sr and disposed on another side of the electrolyte layer in the first direction, and a reaction preventing layer disposed between the electrolyte layer and the cathode. The reaction preventing layer contains Zr in an amount of 0.015 wt % to 1 wt %.

A membrane catalyst layer assembly production method is provided for producing a membrane catalyst layer assembly by discharging catalyst ink having a solvent and a solid component onto an electrolyte membrane. The membrane catalyst layer assembly production method includes forming a first catalyst ink layer having a first porosity on the electrolyte membrane by controlling a porosity of a catalyst ink layer that is formed by the catalyst ink making impact with the electrolyte membrane by adjusting an amount of solvent in the catalyst ink in drop form prior to impact with the electrolyte membrane, and forming a second catalyst ink layer having a second porosity, which is different from the first porosity, on the first catalyst ink layer, by adjusting the amount of solvent in the catalyst ink in drop form prior to impact with the first catalyst ink layer.

The present specification relates to a method for manufacturing a membrane-electrode assembly, a membrane-electrode assembly manufactured using the same, and a fuel cell comprising the same.

A method of making a gas producer includes providing a first tubular electrode; coating the inner or outer surface of the first tubular electrode with an electrolyte material; coating the electrolyte material with a second electrode material; and sintering the second electrode material using electromagnetic radiation to form a second tubular electrode.

A negative electrode active material slurry is applied to one surface of a strip-shaped negative electrode core so as to form multiple lines of the negative electrode active material slurry, the lines extending in an X direction and being spaced from each other in a Y direction. Subsequently, while keeping the negative electrode core aloft, first hot air is blown toward the negative electrode core from at least a lower side in a vertical direction, and then, while keeping the negative electrode core aloft, first cooling air having a lower temperature than the first hot air is blown toward the negative electrode core from at least the lower side in the vertical direction so as to decrease the temperature of the negative electrode core to 40 C. or lower.

The present invention relates to an apparatus and method for monitoring a dry state of an electrode substrate in which electrode slurry is applied to a collector. The monitoring method comprises emitting light onto a surface of the electrode substrate; receiving the light reflected by the surface of the electrode substrate; and analyzing a luminous intensity or spectrum of the received light to estimate a drying rate of the electrode substrate.

The apparatus includes a light emitting part emitting light from a light source onto a surface of the electrode substrate; a light receiving part receiving the light reflected by the surface of the electrode substrate; and a computing device analyzing a luminous intensity or spectrum of the received light and comparing analyzed characteristics of the light with the reference data of the reflected light to the drying rate of the electrode substrate.