Abstract: Disclosed are an aluminum separator for a fuel cell and a manufacturing method thereof, in which a coating layer is formed on a surface of the aluminum separator, thus increasing thermal conductivity and electrical conductivity as well as corrosion resistance. The aluminum separator includes a separator substrate provided in a separator shape using aluminum; and a coating layer formed on a surface of the separator substrate by coating with a composite material composed of graphene and a radical scavenger.

Abstract: An air conditioner includes a body including an air inlet configured to receive air from an air compressor configured to press and transfer the air to provide the air to a cathode of a fuel cell stack. An air element is configured to supply the air to the cathode, and an inner space allows the air inlet and the air outlet to communicate with each other. A plurality of tubes is provided in the inner space of the body and through which fluid flows along hollows holes of the tubes. While the air supplied through the air inlet passes through the inner space, the air is cooled through heat exchange with the fluid flowing along the hollows of the tubes.

Abstract: Disclosed are a chemochromic nanoparticle, a method for manufacturing the chemochromic nanoparticle, and a hydrogen sensor comprising the chemochromic nanoparticle. In particular, the chemochromic nanoparticle has a core-shell structure such that the chemochromic nanoparticle and comprises a core comprising a hydrated or non-hydrated transition metal oxide; and a shell comprising a transition metal catalyst.

Abstract: A system and device for water evaporation of a fuel cell, and a control method thereof, are disclosed. The system includes a stack provided in a fuel cell vehicle to produce electric power. The system includes an injection member connected to the stack. The injection member retains water generated in the stack, and injects water at high pressure and evaporates injected water particles. The system includes a compressor that supplies high-temperature air to the injection member. Even when the fuel cell vehicle is cold-started, evaporation is enabled through water injection to directly cool air supplied to the stack. Water is evaporated even without a humidifier so that performance of the fuel cell system may be enhanced, while reducing cost.

Abstract: Disclosed are an aluminum separator for a fuel cell and a manufacturing method thereof, in which a coating layer is formed on a surface of the aluminum separator, thus increasing thermal conductivity and electrical conductivity as well as corrosion resistance. The aluminum separator includes a separator substrate provided in a separator shape using aluminum; and a coating layer formed on a surface of the separator substrate by coating with a composite material composed of graphene and a radical scavenger.

Abstract: A manifold device of a fuel cell stack is provided which prevents moisture condensed in gases supplied to the fuel cell stack from excessively flowing into specific cells of the stack by heating gases supplied into the stack using heat of the stack. The manifold device also prevents flooding that is caused by liquid generated in cells disposed away from a gas inlet by removing a flow rate difference of gases generated in respective cells based on distances from the gas inlet of the stack.

Abstract: Disclosed are a chemochromic nanoparticle, a method for manufacturing the chemochromic nanoparticle, and a hydrogen sensor comprising the chemochromic nanoparticle. In particular, the chemochromic nanoparticle has a core-shell structure such that the chemochromic nanoparticle and comprises a core comprising a hydrated or non-hydrated transition metal oxide; and a shell comprising a transition metal catalyst.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.

Abstract: Disclosed are a hydrogen detection sensor and a method of manufacturing the same. The hydrogen detection sensor is manufactured by using hydrothermal synthesis method to synthesize a molybdenum oxide (MoO3) nanostructure, and irradiating UV light thereon to form an MoO3—Pd nanocomposite comprising the molybdenum oxide nanostructure with palladium (Pd) catalyst particles, and coating the MoO3—Pd nanocomposite on a substrate. As such, a visible color change from the MoO3 before and after exposure to hydrogen may be so obvious that the sensing or sensitivity of hydrogen and the long-term stability may be substantially improved. In addition, the manufacturing process is simple, and the manufacturing costs may be reduced.

Abstract: A humidifier for a fuel cell system is provided to improve humidification efficiency of a hollow fiber improving a gas flow inside a membrane module into which tube side air and moist air are introduced. The humidifier includes a membrane module in which hollow fibers are fixed inside a case in a bundle form and a first manifold and a second manifold each assembled at both ends of the case. An inside of the membrane module includes a tube side air supply tube which forms a gas flow in the same direction as the hollow fiber and one side of the tube side air supply tube includes at least one moist air pumping part configured to suction moist air flowing in an exterior of the tube side air supply tube by a flow velocity and a flow pressure of tube side air.

Abstract: A fuel cell is provided which comprises a plurality of manifolds at a first end and a second end of the fuel cell and a separator having passages between the first and the second ends of the fuel cell. In particular, the fuel cell includes a nozzle disposed between at least one of the plurality of manifolds and the passages and having an inlet into which a material is introduced from the at least one of the plurality of manifolds and an outlet from which the introduced material is discharged to the passages.

Abstract: An air conditioner includes a body including an air inlet configured to receive air from an air compressor configured to press and transfer the air to provide the air to a cathode of a fuel cell stack. An air element is configured to supply the air to the cathode, and an inner space allows the air inlet and the air outlet to communicate with each other. A plurality of tubes is provided in the inner space of the body and through which fluid flows along hollows holes of the tubes. While the air supplied through the air inlet passes through the inner space, the air is cooled through heat exchange with the fluid flowing along the hollows of the tubes.

Abstract: A system and device for water evaporation of a fuel cell, and a control method thereof, are disclosed. The system includes a stack provided in a fuel cell vehicle to produce electric power. The system includes an injection member connected to the stack. The injection member retains water generated in the stack, and injects water at high pressure and evaporates injected water particles. The system includes a compressor that supplies high-temperature air to the injection member. Even when the fuel cell vehicle is cold-started, evaporation is enabled through water injection to directly cool air supplied to the stack. Water is evaporated even without a humidifier so that performance of the fuel cell system may be enhanced, while reducing cost.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.

Abstract: A compressed air cooling apparatus of a fuel cell system is provided that includes i) a heat absorber installed at a first part of an air supplying system which supplies compressed air of a first compressed by an air compressor to a fuel cell stack, ii) a heat radiator installed at a second part of a stack cooling system which cools a coolant circulating to the fuel cell stack, iii) a heat pipe which connects the heat absorber and the heat radiator and is filled with the refrigerant therein, wherein the heat absorber is disposed at a lower position than the heat radiator for the refrigerant to flow from the heat radiator to the heat absorber.

Abstract: A hydrogen feed and recirculation device for a fuel cell system supplies hydrogen from a hydrogen tank and unreacted recirculated hydrogen discharged from a stack to the stack. The hydrogen feed and recirculation device can supply hydrogen to the stack through a first nozzle when hydrogen supply pressure is low and supply the hydrogen to the stack through a second nozzle using a Coanda Effect other than the first nozzle when the hydrogen supply pressure is high to satisfy a required hydrogen supply amount through an entire operating area of the fuel cell and prevent nozzle vibration and noise generation.

Abstract: Disclosed herein is a hydrogen detecting sensor that includes a sulfide-metal catalyst, such that hydrogen gas can be detected visibly with naked eyes. Particularly, the hydrogen detecting sensor includes a substrate, a sulfide layer formed on the substrate and chemically discolored when exposed to hydrogen, and a metal catalytic layer formed on the sulfide layer.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.

Abstract: Disclosed are a hydrogen detection sensor and a method of manufacturing the same. The hydrogen detection sensor is manufactured by using hydrothermal synthesis method to synthesize a molybdenum oxide (MoO3) nanostructure, and irradiating UV light thereon to form an MoO3—Pd nanocomposite comprising the molybdenum oxide nanostructure with palladium (Pd) catalyst particles, and coating the MoO3—Pd nanocomposite on a substrate. As such, a visible color change from the MoO3 before and after exposure to hydrogen may be so obvious that the sensing or sensitivity of hydrogen and the long-term stability may be substantially improved. In addition, the manufacturing process is simple, and the manufacturing costs may be reduced.

Abstract: A fuel cell system with an ejector is provided. In particular, the system includes a stack, fuel injection nozzle and a water injection nozzle. In particular, the stack produces electricity via an electrochemical reaction using fuel and air. The fuel injection nozzle injects fuel into the stack and the water injection nozzle injects water into the fuel injection nozzle. In particular, water is supplied from the water injection nozzle into the fuel injection nozzle due to a vacuum within the fuel injection nozzle.