Abstract: A cathode catalyst layer includes a cathode catalyst to hydrogenate a substance to be hydrogenated and a water repellent including an aggregate of arbitrary primary particles, the water repellent having a higher affinity for the substance to be hydrogenated and an organic hydride than for water. A volume fraction of the water repellent in the cathode catalyst layer is higher than 10 vol % with respect to the volume of the total solid content of the cathode catalyst layer.

Abstract: A cathode catalyst layer includes a cathode catalyst to hydrogenate a substance to be hydrogenated, a porous catalyst support supporting the cathode catalyst, and a non-porous body including an aggregate of arbitrary primary particles. A volume fraction of the non-porous body in the cathode catalyst layer is higher than 10 vol % with respect to the volume of the total solid content of the cathode catalyst layer.

Abstract: A solid polymer fuel cell stack has a layered product comprised of a plurality of cells stacked, and is so structured that the layered product is fastened by end plates on both sides thereof via a current collector and an insulating plate on each side. Each cell is structured such that an MEA is sandwiched between an anode-side plate, which is provided with a fuel path disposed counter to an anode of the MEA, and a cathode-side plate, which is provided with an oxidizing agent path disposed counter to a cathode of the MEA. An MEA is comprised of a solid polymer electrolyte membrane, an anode and a cathode. The solid polymer electrolyte membrane is composed of powder of basic polymer such as polybenzimidazole, strong acid such as phosphoric acid impregnated with the basic polymer, and binder such as fluorocarbon resin.

Abstract: A membrane electrode assembly (MEA) is structured such that an anode is joined, via a carbon layer, to one surface of a solid polymer electrolyte membrane containing PBI and phosphoric acid and a cathode is joined to the other surface. The carbon layer is constituted by carbon powder and a first binder. Carbon black, carbon nanotube and the like may be used as carbon powder. The thickness of the carbon layer is preferably greater than that of the solid polymer electrolyte membrane.

Abstract: A proton conductive polymer electrolyte includes an acidic functional group-containing aromatic hydrocarbon polymer and an electron donor functional group-containing compound. When used in a fuel cell, the proton conductive polymer electrolyte provides a long-term stable power generating performance at an operating temperature from 100° C. to 200° C. in non-humidified conditions or a relative humidity of 50% or less.

Abstract: A fuel cell electrolyte according to one aspect of the invention contains a basic polymer and a phosphate compound expressed by the following general formula (1): where R represents an alkyl or alkoxyalkyl group, and n is 1 or 2.

Abstract: Aspects of the present invention provide a proton conductive electrolyte suitable for a fuel cell material and a fuel cell including the proton conductive electrolyte. More particularly, aspects of the present invention provide a proton conductive electrolyte that has good proton conductivity and can be used to form a membrane having good flexibility. As a result, the proton conductive electrolyte can be used in a fuel cell, the electrolyte membrane of a fuel cell or the electrodes thereof, and can provide a solid polymer fuel cell having high current density, high power and long life-time in a dry environment (relative humidity of 50% or less) at an operating temperature of 100 to 200° C.

Abstract: An electrolyte for a fuel cell comprising a proton conducting resin comprising a backbone comprising a polyurea resin and side chains that comprise an active hydrogen group at a terminal and a fuel cell employing the same are provided. The electrolyte has improved proton conductivity, heat resistance, and mechanical strength.

Abstract: Dimensional change occurring in a fuel cell electrolyte including a basic polymer after the electrolyte is doped with acid is regulated and the occurrence of wrinkles and the like is reduced. A fuel cell electrolyte comprises a basic polymer and an organic phosphonic acid expressed by the following general formula (1): where R represents an alkyl, aryl, acyl, amino, phosphonic group or a derivative of the functional group, and n is 1 or 2.

Abstract: A fuel cell electrolyte comprises: a basic polymer; an organic phosphonic acid expressed by the following general formula (1); and a hydrolyzable phosphate compound expressed by the following general formula (2): where R represents an alkyl, aryl, acyl, amino, phosphonic group or a derivative of the functional group, and n is 1 or 2, and R represents an alkyl or alkoxyalkyl group, and n is 1 or 2.

Abstract: The invention provides a proton-conducting electrolyte that has excellent proton-conducting properties, heat resistance, and chemical stability without containing any fluorine. The proton-conducting electrolyte contains polyamide sulfamidic acid in which a polyamide backbone has side chains of sulfamidic acid groups. The polyamide sulfamidic acid may be represented by the formula: where Ar1 and Ar2 are each an aromatic ring or a group containing an aromatic ring and n is the average degree of polymerization and is an integer between 100-300,000.

Abstract: A proton conductive polymer electrolyte includes an acidic functional group-containing aromatic hydrocarbon polymer and an electron donor functional group-containing compound. When used in a fuel cell, the proton conductive polymer electrolyte provides a long-term stable power generating performance at an operating temperature from 100° C. to 200° C. in non-humidified conditions or a relative humidity of 50% or less.

Abstract: A fuel cell electrolyte comprises: a basic polymer; an organic phosphonic acid expressed by the following general formula (1); and a hydrolyzable phosphate compound expressed by the following general formula (2): where R represents an alkyl, aryl, acyl, amino, phosphonic group or a derivative of the functional group, and n is 1 or 2, and R represents an alkyl or alkoxyalkyl group, and n is 1 or 2.

Abstract: A fuel cell that operates at high temperature under non-humid conditions using an electrolyte membrane prepared by impregnating a basic polymer with an acid and a method of producing an electrode for a fuel cell, the fuel cell includes a catalyst layer electrode that can prevent the inhibition of gas diffusion due to generated water and the inhibition of gas diffusion due to an electrode catalyst being covered with an acid that leaks from the electrolyte membrane impregnated with the acid. The electrode includes a catalyst layer including a platinum-containing catalyst, a basic polymer, and a hydrophobic binder.

Abstract: A membrane electrode assembly (MEA) is structured such that an anode is joined, via a carbon layer, to one surface of a solid polymer electrolyte membrane containing PBI and phosphoric acid and a cathode is joined to the other surface. The carbon layer is constituted by carbon powder and a first binder. Carbon black, carbon nanotube and the like may be used as carbon powder. The thickness of the carbon layer is preferably greater than that of the solid polymer electrolyte membrane.

Abstract: A solid polymer fuel cell stack has a layered product comprised of a plurality of cells stacked, and is so structured that the layered product is fastened by end plates on both sides thereof via a current collector and an insulating plate on each side. Each cell is structured such that an MEA is sandwiched between an anode-side plate, which is provided with a fuel path disposed counter to an anode of the MEA, and a cathode-side plate, which is provided with an oxidizing agent path disposed counter to a cathode of the MEA. An MEA is comprised of a solid polymer electrolyte membrane, an anode and a cathode. The solid polymer electrolyte membrane is composed of powder of basic polymer such as polybenzimidazole, strong acid such as phosphoric acid impregnated with the basic polymer, and binder such as fluorocarbon resin.

Abstract: Dimensional change occurring in a fuel cell electrolyte including a basic polymer after the electrolyte is doped with acid is regulated and the occurrence of wrinkles and the like is reduced.

Abstract: A fuel cell electrolyte according to one aspect of the invention contains a basic polymer and a phosphate compound expressed by the following general formula (1): where R represents an alkyl or alkoxyalkyl group, and n is 1 or 2.

Abstract: Disclosed herein is an electrode for a fuel cell, comprising an ionic conductor containing a basic polymer and a strong acid, and a catalyst containing a noble metal. An example of the basic polymer includes polybenzimidazole. Examples of the strong acid include phosphoric acid and sulfuric acid. As a noble metal, platinum is preferably used. In the case where platinum is used as a catalyst, the weight of the ionic conductor is preferably 0.5 to 50% by weight with respect to the weight of the catalyst.

Abstract: An electrolyte for a fuel cell comprising a proton conducting resin comprising a backbone comprising a polyurea resin and side chains that comprise an active hydrogen group at a terminal and a fuel cell employing the same are provided. The electrolyte has improved proton conductivity, heat resistance, and mechanical strength.