A method is disclosed for preparing a metal single-atom catalyst for a fuel cell including the steps of depositing metal single atoms to a nitrogen precursor powder, mixing the metal single atom-deposited nitrogen precursor powder with a carbonaceous support, and carrying out heat treatment. The step of depositing metal single atoms is carried out by sputtering, thermal evaporation, E-beam evaporation or atomic layer deposition. The method uses a relatively lower amount of chemical substances as compared to conventional methods, is eco-friendly, and can produce a single-atom catalyst at low cost. In addition, unlike conventional methods which are limited to certain metallic materials, the present method can be applied regardless of the type of metal.

Method of manufacturing of a membrane with surface fiber structure, in particular for use in an electrolyzer or fuel cell, by inserting the polymer membrane into the vacuum chamber equipped with a magnetron sputtering system with a cerium oxide target in which an atmosphere of O.sub.2 and inert gas is formed and igniting the plasma which leads to simultaneous plasma etching of the membrane surface and deposition of cerium oxide onto the surface of etched membrane resulting in formation of fibers. The membrane is made of polymer and on at least one of its sides features porous surface made of fibers, the cross-sectional dimensions of which are lower than their length and which are integral and inseparable part of membrane body.

Provided is a highly reliable fuel cell that improves power generation efficiency of the fuel cell and that is less likely to cause damage to an electrode and an electrolyte film. The fuel cell includes a support substrate (2, 3) having a region in which a support portion having a mesh-like shape in a plan view is provided, a first electrode 4 on the support substrate, an electrolyte film 5 on the first electrode, and a second electrode 6 on the electrolyte film. The first electrode includes a first thin film electrode 4A formed in a manner of covering at least the region, and a first mesh-like electrode 4B connected to the first thin film electrode and provided corresponding to the support portion. The first mesh-like electrode 4B has a film thickness larger than that of the first thin film electrode and has a mesh-like shape in a plan view.

The present invention presents a method for manufacturing a negative electrode of a solid oxide cell in a three-dimensional structure by using a pressurization process. In addition, the present invention proposes a structure in which the entire interface of a solid oxide cell is manufactured on the manufactured three-dimensional negative electrode substrate, through various deposition methods, in a three-dimensional structure so as to maximize a reaction area.

Disclosed are a metal single-atom catalyst and a method for preparing the same. The method uses a minimal amount of chemicals and is thus environmentally friendly compared to conventional chemical and/or physical methods. In addition, the method enables the preparation of a single-atom catalyst in a simple and economical manner without the need for further treatment such as acid treatment or heat treatment. Furthermore, the method is universally applicable to the preparation of single-atom catalysts irrespective of the kinds of metals and supports, unlike conventional methods that suffer from very limited choices of metal materials and supports. Therefore, the method can be widely utilized to prepare various types of metal single-atom catalysts. All metal atoms in the metal single-atom catalyst can participate in catalytic reactions. This optimal atom utilization achieves maximum reactivity per unit mass and can minimize the amount of the metal used, which is very economical.

The present disclosure relates to a polymer electrolyte membrane fuel cell including a tungsten oxide-coated component, where the polymer electrolyte membrane fuel cell includes a unit cell constituted by a membrane-electrode assembly (MEA), in which an electrolyte membrane and a catalyst layer are integrally combined, a gas diffusion layer, and a bipolar plate, and tungsten oxide is coated on a surface of at least one of the membrane-electrode assembly, the gas diffusion layer, or the bipolar plate, and a method for manufacturing the same. According to the present disclosure, catalyst and cell durability can be enhanced by reducing a carbon oxidation reaction through prevention of the occurrence of high voltage under SU/SD (start-up/shut-down) conditions, and the performance can be maintained due to the absence of current density reduction even under SU/SD conditions.

A metal-air battery includes an anode; a low-dimensional catalyst cathode; and an electrolyte; wherein: the low-dimensional catalyst cathode comprises a functional metal layer on a carbon support overcoated with a catalyst layer; the electrolyte comprises an aprotic solvent that is an ether-based solvent, a fluorinated ether-based solvent, an oligo (ethylene oxide) solvent, or a mixture of any two or more thereof; and the electrolyte is free of carbonate solvents.

Provided is a highly reliable fuel cell that improves power generation efficiency of the fuel cell and that is less likely to cause damage to an electrode and an electrolyte film. The fuel cell includes a support substrate (2, 3) having a region in which a support portion having a mesh-like shape in a plan view is provided, a first electrode 4 on the support substrate, an electrolyte film 5 on the first electrode, and a second electrode 6 on the electrolyte film. The first electrode includes a first thin film electrode 4A formed in a manner of covering at least the region, and a first mesh-like electrode 4B connected to the first thin film electrode and provided corresponding to the support portion. The first mesh-like electrode 4B has a film thickness larger than that of the first thin film electrode and has a mesh-like shape in a plan view.

A method of forming a fuel cell catalyst system, the method includes providing an anticorrosive, conductive catalyst support material having oxygen vacancies and a formula (I):
MgTi.sub.2O.sub.5-δ  (I),
where .sub.δ is any number between 0 and 3 optionally including a fractional part denoting the oxygen vacancies, coating the catalyst support material with a polymeric film, attaching a catalyst material onto the polymeric film, removing the polymeric film, and providing additional material onto the support material to increase physical, electrical, and/or mechanical contact between the catalyst material and the catalyst support material.

The present disclosure relates to an electrolyte membrane for fuel cells having improved chemical durability and a method of manufacturing the same. Specifically, the method includes preparing a polymer film, depositing catalyst metal on one surface or opposite surfaces of the polymer film to obtain a reinforcement layer, and impregnating the reinforcement layer with an ionomer to obtain an electrolyte membrane.