Disclosed herein are real time hydrogen self-supplied alkaline membrane fuel cell that operates with hydrogen produced in situ. The hydrogen self-supplied alkaline membrane fuel cell can comprise (i) a hydrogen generation reactor that provides continuous, on-demand supply of hydrogen, wherein the hydrogen generation reactor produces hydrogen by reacting metal particles with water in the presence of an alkaline catalyst, and (ii) a membrane electrode assembly adapted to receive an oxidant and a fuel stream containing hydrogen produced in the hydrogen generation reactor. The membrane electrode assembly comprises an electrolyte membrane and at least two electrodes. The electrolyte membrane can comprise cellulose and the electrolyte can comprise a base such as aqueous potassium hydroxide. Methods for operating an alkaline membrane fuel cell are also disclosed.

In an electrolyte membrane for a fuel cell, having nanofiber unwoven cloth buried in an electrolyte resin, the nanofiber unwoven cloth is disposed being exposed only from one face of the electrolyte membrane. The fuel cell includes a MEA having an anode electrode disposed on one face of the electrolyte membrane and having a cathode electrode disposed on the other face thereof, and a pair of separators holding the MEA by sandwiching the MEA therebetween. Thereby, the electrolyte membrane for a fuel cell, the manufacturing method of the electrolyte membrane, and the fuel cell are provided with which the electric power generation property and productivity are improved.

In an electrolyte membrane for a fuel cell, having nanofiber unwoven cloth buried in an electrolyte resin, the nanofiber unwoven cloth is disposed being exposed only from one face of the electrolyte membrane. The fuel cell includes a MEA having an anode electrode disposed on one face of the electrolyte membrane and having a cathode electrode disposed on the other face thereof, and a pair of separators holding the MEA by sandwiching the MEA therebetween. Thereby, the electrolyte membrane for a fuel cell, the manufacturing method of the electrolyte membrane, and the fuel cell are provided with which the electric power generation property and productivity are improved.

Disclosed are an antioxidant for fuel cells and a membrane-electrode assembly including the same. The membrane-electrode assembly may have obtained greatly improved durability by using an antioxidant having a novel composition that may provide excellent antioxidant activity and long-term durability.

A method of manufacturing an electrolyte membrane for fuel cells with improved durability for fuel cells includes: preparing a substrate; applying a first ionomer solution onto the substrate; inserting a porous support into the first ionomer solution to impregnate the first ionomer solution in the porous support; allowing the first ionomer solution-impregnated porous support to stand; applying a second ionomer solution to the first ionomer solution-impregnated porous support; and drying the porous support.

Covalent Organic Frameworks (COFs) or Metal Organic Frameworks (MOFs) are synthesized to transport proton ions in PEM fuel cell applications. The pore size of organic frameworks and the number of sulfonyl functional groups inside their pores are controlled to maximize the proton conductivity and minimize the H.sub.2 and O.sub.2 crossover thru the membrane. The surface of MOF or COF crystal flakes is chemically modified to improve the mixability with polymer binder and this avoids the formation of physical defects or voids between polymer binder and crystals. The proton conducing membrane is made by dissolving a polymer binder in a solvent and then adding the chemically modified flakes into the solution and forming it into a film. The MOF or COF flakes can also be coated onto the proton conducting polymer membranes or continuously grown into larger size of films in solutions.

Covalent Organic Frameworks (COFs) or Metal Organic Frameworks (MOFs) are synthesized to transport proton ions in PEM fuel cell applications. The pore size of organic frameworks and the number of sulfonyl functional groups inside their pores are controlled to maximize the proton conductivity and minimize the H.sub.2 and O.sub.2 crossover thru the membrane. The surface of MOF or COF crystal flakes is chemically modified to improve the mixability with polymer binder and this avoids the formation of physical defects or voids between polymer binder and crystals. The proton conducing membrane is made by dissolving a polymer binder in a solvent and then adding the chemically modified flakes into the solution and forming it into a film. The MOF or COF flakes can also be coated onto the proton conducting polymer membranes or continuously grown into larger size of films in solutions.

The present disclosure relates to an electrolyte membrane for membrane-electrode assemblies containing a catalyst including a hollow nanoparticle having a polyhedral framework and a method of manufacturing the same. Specifically, the electrolyte membrane includes an electrolyte layer including a proton conductive ionomer and a catalyst dispersed in the electrolyte layer, wherein the catalyst includes a hollow nanoparticle having a polyhedral framework.

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.

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.