A method for manufacturing a catalyst support includes: heat-treating a crystalline carbon support in a temperature range from 700 C. to 1100 C. under a vapor atmosphere to increase a specific surface area of the carbon support; and applying a magnetic field to the increased specific surface area of the carbon support to remove an impurity.

A method for manufacturing a gas diffusion layer for a fuel cell wherein carbon nanotubes are impregnated into Korean paper, thereby enhancing electroconductivity, and a gas diffusion layer manufactured thereby. The method for manufacturing a gas diffusion layer for a fuel cell which is to manufacture a gas diffusion layer as a constituent member of a unit cell in a fuel cell, includes a support preparation step of preparing a support with Korean paper; a dispersion preparation step of dispersing a carbon substance in a solvent to form a dispersion, a coating step of coating the support with the dispersion, and a thermal treatment step of thermally treating the dispersion-coated support to fix the carbon substance to the support.

Nanoporous oxygen reduction catalyst material comprising PtNiIr. The nanoporous oxygen reduction catalyst material is useful, for example, in fuel cell membrane electrode assemblies.

A method of manufacturing a membrane-catalyst assembly including an electrolyte membrane and a catalyst layer bonded to the electrolyte membrane, the method including: a liquid application step of applying, in the atmosphere, a liquid to only a surface of the electrolyte membrane before bonding; and a thermocompression bonding step of bonding, to the catalyst layer, the electrolyte membrane to which the liquid is applied, by thermocompression bonding. Provided is a method of manufacturing a membrane-catalyst assembly including a polymer electrolyte membrane and a catalyst layer bonded to the polymer electrolyte membrane, in which the manufacturing method can achieve both the relaxation of thermocompression bonding conditions and the improvement of adhesion between the catalyst layer and the electrolyte membrane with high productivity.

Provided are a cathode catalyst layer and a preparation method and use thereof, and a fuel cell. The method includes: mixing a catalyst, water, and an alcohol with a pore-forming agent to obtain a mixture; dispersing the mixture into a Nafion solution to obtain a slurry; and coating the slurry onto a surface of a diffusion layer to obtain a coated diffusion layer, and subjecting the coated diffusion layer to calcination and freeze-drying in sequence to obtain the cathode catalyst layer.

An embodiment apparatus for fabricating a membrane-electrode-subgasket assembly includes a feeding unit including a sheet feeding roller configured to feed a membrane-electrode assembly sheet having catalyst layers provided on both surfaces thereof, a cutting unit including a cutting roller and a support roller configured to rotate in engagement with the cutting roller, wherein the cutting roller is configured to punch portions outside each of the catalyst layers, a first pressing unit including a suction roller and a first hot roller, and a second pressing unit including second hot rollers.

A cathode for a metal-air battery, the cathode including a mixed conductor; and first pores having a size of about 1 micrometer (m) or greater, wherein an amount of the first pores is about 30 volume percent (volume %) or greater, with respect to a total volume of pores in the cathode, and a total porosity of the cathode is about 50% or greater, based on a total volume of the cathode.

A substrate, with an electrode layer for a metal-supported electrochemical element of a solid oxide fuel cell or a solid oxide electrolytic cell, including a metal support, an electrode layer formed on/over the metal support, and an intermediate layer formed on/over the electrode layer, wherein the intermediate layer has a region with a surface roughness (Ra) of 1.0 m or less.

An electrolyte membrane with a backsheet is sent out from an electrolyte membrane unwinding roller, and is separated with its second side sucked on a suction roller by a first press roller. While the electrolyte membrane from which the backsheet has been separated is transported with the electrolyte membrane sucked and supported on the suction roller, an electrode ink is applied to a first side of the electrolyte membrane to form an electrode ink layer, which is dried by blowing hot air thereto to form a catalyst layer. Thereafter, in a state in which the outer surface of a second press roller disposed close to the suction roller is in contact with and supported on the first side of the electrolyte membrane, a support film is pressed against the second side of the electrolyte membrane by a third press roller and attached thereto to manufacture a catalyst-coated membrane.

A method of treating a carbon electrode includes heat treating a carbon-based electrode in an environment that is above approximately 325 C. and that includes an oxidizing gas, and prior to use of the carbon-based electrode in an electro-chemical battery device, soaking the carbon-based electrode in an oxidizer solution.