Abstract: Disclosed is a membrane for polymer electrolyte fuel cells, which is composed of a hydrocarbon anion-ex-change resin membrane wherein an anion-exchange group is covalently bonded to a hydrocarbon resin, and an adhesive layer formed on at least one side of the hydrocarbon anion-exchange resin membrane. The membrane for polymer electrolyte fuel cells is characterized in that the adhesive layer is made of an anion-exchange resin having a Young's modulus of 1-1000 MPa.

Abstract: The present invention discloses a membrane for polymer electrolyte fuel cell, which comprises a hydrocarbon cation exchange resin membrane wherein a cation exchange group is covalently bonded to a hydrocarbon resin, and an adhesive layer formed on at least one side of the hydrocarbon cation exchange resin membrane, wherein the adhesive layer is made of a hydrocarbon cation exchange resin having a Young's modulus of 1 to 300 MPa and a solubility of less than 1% by mass in water of 20° C.; and a membrane-electrode assembly which is obtained by forming a catalyst electrode layer on at least one side of the above-mentioned membrane for polymer electrolyte fuel cell.

Abstract: Disclosed is a membrane for a fuel cell, which comprises: a polymer electrolyte membrane which comprises a cross-linked anion-exchange resin having a strongly basic anion-exchange group such as a quaternary ammonium salt group, a quaternary pyridinium salt group and a quaternary imidazolium salt group; and a polymer which is attached on at least one surface of the polymer electrolyte membrane and has a weakly acidic group such as a polyacrylic acid. Also disclosed is a method for producing the membrane.

Abstract: The present invention discloses a membrane for a fuel cell, comprising: a solid polymer electrolyte membrane composed of a crosslinked ion exchange resin, and a polymer having a weight-average molecular weight of 5,000 to 1,000,000 and having a charge group of polarity opposite to that of the ion exchange group of the ion exchange resin, which polymer is adhered onto at least one surface of the solid polymer electrolyte membrane in an amount of 0.0001 to 0.5 mg/cm3, preferably in a state that, when the membrane for fuel cell is immersed in a 50 mass % aqueous methanol solution of 30° C.

Abstract: Disclosed is a membrane for polymer electrolyte fuel cells, which is composed of a hydrocarbon anion-ex-change resin membrane wherein an anion-exchange group is covalently bonded to a hydrocarbon resin, and an adhesive layer formed on at least one side of the hydrocarbon anion-exchange resin membrane. The membrane for polymer electrolyte fuel cells is characterized in that the adhesive layer is made of an anion-exchange resin having a Young's modulus of 1-1000 MPa.

Abstract: The present invention discloses: a membrane for fuel cell, comprising: a solid polymer electrolyte membrane composed of a crosslinked ion exchange resin, and a polymer having a weight-average molecular weight of 5,000 to 1,000,000 and having a charge group of polarity opposite to that of the ion exchange group of the ion exchange resin, which polymer is adhered onto at least one surface of the solid polymer electrolyte membrane in an amount of 0.0001 to 0.5 mg/cm2 preferably in a state that, when the membrane for fuel cell is immersed in a 50 mass % aqueous methanol solution of 30° C.

Abstract: The present invention discloses a membrane for polymer electrolyte fuel cell, which comprises a hydrocarbon cation exchange resin membrane wherein a cation exchange group is covalently bonded to a hydrocarbon resin, and an adhesive layer formed on at least one side of the hydrocarbon cation exchange resin membrane, wherein the adhesive layer is made of a hydrocarbon cation exchange resin having a Young's modulus of 1 to 300 MPa and a solubility of less than 1% by mass in water of 20° C.; and a membrane-electrode assembly which is obtained by forming a catalyst electrode layer on at least one side of the above-mentioned membrane for polymer electrolyte fuel cell.

Abstract: A laminate consisting of an ion exchange membrane layer comprising a porous film reinforcement and a crosslinked ion exchange resin and a conductive layer formed on at least one side of the ion exchange membrane layer and comprising conductive inorganic particles and a crosslinked ion exchange resin, wherein the ion exchange membrane layer and the conductive layer are integrated with each other by the above ion exchange resins constituting these layers. This laminate is excellent in dimensional stability, heat resistance and methanol impermeability, which makes it suitable for use in electrochemical devices such as a direct methanol type fuel cell as a membrane-electrode assembly, has high bonding properties between the electrode layer and the ion exchange membrane layer of the membrane-electrode assembly, and provides a fuel cell whose output is not reduced by long-term use.

Abstract: A laminate consisting of an ion exchange membrane layer comprising a porous film reinforcement and a crosslinked ion exchange resin and a conductive layer formed on at least one side of the ion exchange membrane layer and comprising conductive inorganic particles and a crosslinked ion exchange resin, wherein the ion exchange membrane layer and the conductive layer are integrated with each other by the above ion exchange resins constituting these layers. This laminate is excellent in dimensional stability, heat resistance and methanol impermeability, which makes it suitable for use in electrochemical devices such as a direct methanol type fuel cell as a membrane-electrode assembly, has high bonding properties between the electrode layer and the ion exchange membrane layer of the membrane-electrode assembly, and provides a fuel cell whose output is not reduced by long-term use.