Abstract: Polysulfone based polymer comprising a repeat unit represented by the following Chemical Formula 1 is provided: wherein, X, M1, M2, a, b, c, d, e, f, R1, R2, R3, R4 and n are as defined in the detailed description.

Abstract: The present invention relates to a sulfonated poly(arylene ether) copolymer, a manufacturing method thereof and a polymer electrolyte membrane for fuel cell using the same.

Abstract: The present invention relates to a multi-layered polymer electrolyte membrane for a fuel cell, which is prepared by introducing an anion binding substance as a coating layer to a non-aqueous polymer electrolyte membrane for preventing the elution of acid, and a fuel cell comprising the membrane. In particular, the present invention discloses a multi-layered polymer electrolyte membrane prepared by coating an anion binding substance on a non-aqueous polymer electrolyte membrane, and a fuel cell comprising the membrane, thereby preventing the elution of acid and maintaining the performance of a fuel cell to economic and environmental profit.

Abstract: The present invention relates to a polymer blend electrolyte membrane comprising an inorganic polymer having polydimethylsiloxane as a main chain, which has a pore structure at both ends formed by condensation reaction between 3-aminopropyltriethoxysilane and tetraethylorthosilicate, wherein phosphoric acid is chemically linked to an amino group of the pore structure; and a proton-conducting polymer having a cation exchange group at the side chain thereof, as well as a manufacturing method thereof. Generally, proton-conducting electrolyte membranes have significantly reduced ion conductivity at high temperatures. However, proton-conducting electrolyte membranes have advantages in terms of efficiency and cost, and thus it is needed to develop an electrolyte membrane, which has excellent ion conductivity even at high temperature. Accordingly, the present invention aims to provide a polymer blend electrolyte membrane for use at high temperature and a manufacturing method thereof.

Abstract: The present invention relates to a sulfonated poly(arylene ether) copolymer, a manufacturing method thereof and a polymer electrolyte membrane for fuel cell using the same.

Abstract: The present invention relates to the structure of a bipolar plate for direction methanol fuel cell, the shape of a flow path and a fuel cell including them, more particularly, to the structure of a bipolar plate for direct methanol fuel cell using a flow path with a dispersion structure not the existing serpentine type for supplying a fuel to the new bipolar plate and functioning as a collector and the shape of a flow path. According to the present invention, a fluid flow resistance is decreased and a direct reaction region of a fluid and an electrode catalyst is increased in a bipolar plate, and therefore the performance of a fuel Cell can be improved.

Abstract: The present invention provides an electrode binder for a polymer electrolyte membrane fuel cell which includes a hydrocarbon-based polymer and a water-soluble polymer acting as a porogen, a porous hydrocarbon-based electrode catalyst layer including the electrode binder, and a method of manufacturing the same. Because of the use of the porogen, the pore size and porosity of the hydrocarbon-based binder catalyst layer are optimized, and bondability of a hydrocarbon-based membrane electrode assembly is enhanced. The present invention also features a fuel cell manufactured using the porogen.

Abstract: The present invention relates to an electrolyte membrane comprising an aluminum-based compound for a high-temperature fuel cell, and a polymer electrolyte membrane fuel cell comprising the electrolyte membrane. In particular, the present invention relates to an electrolyte membrane for a high-temperature fuel cell where an aluminum-based compound is added as an anionic-binding substance in the conventional electrolyte for a fuel cell, thereby improving electrochemical stability of a fuel cell and increasing cation yield of proton by preventing the elution of anions caused by water generation on electrodes, and a high-performance polymer electrolyte membrane fuel cell comprising the electrolyte membrane.

Abstract: Polysulfone based polymer comprising a repeat unit represented by the following Chemical Formula 1 is provided: wherein, X, M1, M2, a, b, c, d, e, f, R1, R2, R3, R4 and n are as defined in the detailed description.

Abstract: The present invention relates to an electrode binder solution composition for a polymer electrolyte fuel cell comprising a mixture of a solvent and a nonsolvent. The electrode binder solution composition can significantly improve electrode activity by maximizing formation of a three-phase interface of catalyst, binder and fuel at the electrode catalytic layer of the polymer electrolyte fuel cell. The present invention relates to a preparation method of an electrode binder solution for a polymer electrolyte fuel cell, the electrode binder solution for a polymer electrolyte fuel cell comprising a sulfonated proton exchange hydrocarbon-based polymer and a mixture of a solvent and a nonsolvent.

Abstract: A polymeric electrolyte membrane for a polymer electrolyte membrane fuel cell comprises: (a) a sulfonated polysulfoneketone copolymer comprising an aromatic sulfone repeating unit, an aromatic ketone repeating unit and an aromatic compound repeating unit which connects said repeating units with an ether linkage, wherein the aromatic sulfone repeating unit, the aromatic ketone repeating unit or both have a sulfonic acid or sulfonate substituent; and (b) one or more polymers each comprising a monomer selected from the group consisting of vinylidene fluoride, hexafluoropropylene, trifluoroethylene and tetrafluoroethylene.

Abstract: The present invention relates to a multi-layered polymer electrolyte membrane for a fuel cell, which is prepared by introducing an anion binding substance as a coating layer to a non-aqueous polymer electrolyte membrane for preventing the elution of acid, and a fuel cell comprising the membrane. In particular, the present invention discloses a multi-layered polymer electrolyte membrane prepared by coating an anion binding substance on a non-aqueous polymer electrolyte membrane, and a fuel cell comprising the membrane, thereby preventing the elution of acid and maintaining the performance of a fuel cell to economic and environmental profit.

Abstract: The present invention relates to a polymer blend electrolyte membrane comprising an inorganic polymer having polydimethylsiloxane as a main chain, which has a pore structure at both ends formed by condensation reaction between 3-aminopropyltriethoxysilane and tetraethylorthosilicate, wherein phosphoric acid is chemically linked to an amino group of the pore structure; and a proton-conducting polymer having a cation exchange group at the side chain thereof, as well as a manufacturing method thereof. Generally, proton-conducting electrolyte membranes have significantly reduced ion conductivity at high temperatures. However, proton-conducting electrolyte membranes have advantages in terms of efficiency and cost, and thus it is needed to develop an electrolyte membrane, which has excellent ion conductivity even at high temperature. Accordingly, the present invention aims to provide a polymer blend electrolyte membrane for use at high temperature and a manufacturing method thereof.

Abstract: The present invention relates to a method of activating membrane electrode assemblies of polymer electrolyte membrane fuel cells of a fuel cell stack for a vehicle comprising: supplying a humidified gas to a fuel cell so as to hydrate an electrolyte membrane and an electrolyte of electrodes of the fuel cell; and performing a cyclic voltammetry process so as to activate the layers of the electrodes.

Abstract: The present invention relates to a method for manufacturing a polymer electrolyte fuel cell, and more particularly to a method for manufacturing a polymer composite membrane whose dimensional stability in accordance with hydration is good and a proton conductivity is improved by introducing a fluorinated polymer with a good excellent dimensional stability to sulfonated hydrocarbon-based polymers as proton conducting materials.

Abstract: The present invention relates to the structure of a bipolar plate for direction methanol fuel cell, the shape of a flow path and a fuel cell including them, more particularly, to the structure of a bipolar plate for direct methanol fuel cell using a flow path with a dispersion structure not the existing serpentine type for supplying a fuel to the new bipolar plate and functioning as a collector and the shape of a flow path. According to the present invention, a fluid flow resistance is decreased and a direct reaction region of a fluid and an electrode catalyst is increased in a bipolar plate, and therefore the performance of a fuel cell can be improved.

Abstract: The present invention is directed to a poly(ethylene glycol)-grafted aliphatic polyester represented by Formula 1: wherein X is an aliphatic ester, R is hydrogen or C1-5 alkyl, Z is the binding moiety of an initiator or a chain transfer agent, m/l is from 0.1 to 50, n is from 2 to 50, w is 1 or greater, and y is from 1 to 200. Further disclosed is a method for preparing the poly(ethylene glycol)-grafted aliphatic polyester of the present invention.

Abstract: The present invention is directed to a polymer electrolyte composition for a direct methanol fuel cell which comprises a perfluorinated ionomer (A) and a crosslinked hydrocarbon-based ionomer (B). In some embodiments, the crosslinked hydrocarbon-based ionomer (B) can be obtained by crosslinking a mixture of a monomer containing ionic groups b1, a crosslinking agent b2, a monomer for controlling mechanical properties b3 and an initiator b4. The polymer electrolyte composition can minimize methanol crossover, exhibit improved proton conductivity and exhibit excellent mechanical properties.

Abstract: The present invention is directed to a poly(ethylene glycol)-grafted aliphatic polyester represented by Formula 1: wherein X is an aliphatic ester, R is hydrogen or C1-5 alkyl, Z is the binding moiety of an initiator or a chain transfer agent, m/l is from 0.1 to 50, n is from 2 to 50, w is 1 or greater, and y is from 1 to 200. Further disclosed is a method for preparing the poly(ethylene glycol)-grafted aliphatic polyester of the present invention.