Abstract: There is provided a reformer for a fuel cell system, the reformer comprising: a reforming unit having a reaction substrate in which a catalyst layer is formed in a plurality of flow channels for allowing fuel to flow and for generating hydrogen through a reformation reaction of the fuel using thermal energy. When viewing a cross-section perpendicular to the flow direction of the flow channels, the reaction substrate defines each flow channel by a bottom portion and a pair of wall portions extending from the sides of the bottom portion, and a joint between the bottom portion and the wall portion is formed in a rounded shape.

Abstract: A reformer for a fuel cell system, a fabrication method thereof, and a fuel cell system are provided. The reformer includes a plurality of reaction substrates. The reaction substrates each have a reaction substrate body provided with a flow channel with micropores formed on the surface of the flow channel. In addition, a catalyst layer may be formed within the flow channel of the reaction substrate body. Since the reformer for a fuel cell system suggested in the present invention includes reaction substrates having micropores formed in the flow channel, it has a high specific surface area and high catalyst activity. Moreover, since the catalyst layer is formed by a deposition method, the reformer can be of a small proportion, occupying little space in the fuel cell system.

Abstract: A fuel cell system includes a reformer for generating hydrogen gas from fuel containing hydrogen using a chemical catalytic reaction and thermal energy. At least one electricity generator generates electrical energy by an electrochemical reaction of the hydrogen gas and oxygen. A fuel supply assembly supplies fuel to the reformer, and an oxygen supply assembly supplies oxygen to the at least one electricity generator. A heat exchanger is connected to the reformer and to the at least one electricity generator. The heat exchanger supplies thermal energy of the reformer, during initial operation of the system, to the at least one electricity generator so as to pre-heat the at least one electricity generator.

Abstract: The present invention provides a fuel cell system that comprises a stack that generates electricity through a reaction between hydrogen and oxygen and a fuel processing device that is connected to the stack to generate the hydrogen from fuel and supplies the hydrogen to the stack. It further comprises a fuel supply unit that supplies the fuel to the fuel processing device and an air supply unit that supplies air to the stack and the fuel processing unit, respectively. The fuel processing device comprises a first reformer that generates byproducts along with the hydrogen through an electrolysis reaction of the fuel using electric energy and a second reformer that generates the hydrogen through a reformation reaction of the fuel using thermal energy.

Abstract: A separator for a fuel cell contains nano-graphite thin plates with a thickness of about 3 to 30 nm or clusters of the nano-graphite thin plates. As such, the separator is capable of providing enough electrical conductivity with only a small amount of graphite, is light in weight, and has sufficient mechanical characteristics due to increased binding of graphite to resin, excellent resistance, and excellent thermal stability due to a reduction in the thermal expansion coefficient.

Abstract: The present invention is a fuel cell system including a stack having an electricity generator, that includes separators disposed on both surfaces of a membrane-electrode assembly, a reformer that converts fuel to generate hydrogen gas and supplies the hydrogen gas to the stack, a fuel supply unit that supplies the fuel to the reformer, an air supply unit that supplies air to the stack, a cooling water supply unit that supplies cooling water to the stack, and a flow channel section that is formed in the separator and through that the cooling water supplied from the cooling water supply unit passes.

Abstract: A fuel cell system includes a stack for generating electrical energy by a reaction of the hydrogen and oxygen, a reformer for generating hydrogen gas from fuel through a chemical catalytic reaction by thermal energy, a fuel supply assembly for supplying fuel to the reformer, and an air supply assembly for supplying air to the reformer and the stack. The reformer includes a plurality of reactors having a channel, respectively, and being stacked.

Abstract: A fuel cell system that includes at least one electricity generator that generates electric energy through electrochemical reaction between hydrogen and oxygen, a reformer that generates hydrogen gas by reforming fuel containing hydrogen and supplies the hydrogen gas to the electricity generator, a fuel supply unit which supplies the fuel to the reformer, and an oxygen supply unit which supplies oxygen to the electricity generator and the reformer. The reformer includes a double pipe lines that are arranged concentrically and have independent flow paths through which fuel passes, and catalytic layers that are formed in the flow paths, generate thermal energy through chemical catalytic reaction, and generate hydrogen gas from the fuel.

Abstract: A reformer of a fuel cell system and a fuel cell system including a reformer are disclosed. The reformer includes a reformation unit comprising a pipe through which fuel passes. The pipe is formed from a material adapted to induce a catalytic reformation reaction in the pipe. The reformer includes a heat source unit for heating and evaporating the fuel by heating the pipe. The fuel cell system includes such a reformer, a stack for generating electricity through an electrochemical reaction between oxygen and hydrogen, a fuel supply unit, and an air supply unit.

Abstract: A fuel cell system includes a reformer for reforming fuel and generating hydrogen gas. A stack generates electricity through an electrochemical reaction between the hydrogen gas and oxygen. A fuel supply unit supplies fuel to the reformer. An air supply unit supplies air to the reformer and the stack. The reformer includes a reformation reactor unit for generating the hydrogen gas and a heat-insulating unit including a vacuum area covering the reformation reactor unit and recovering heat generated from the reformation unit.

Abstract: A fuel cell system includes at least one electricity generator which generates electric energy through electrochemical reaction between hydrogen and oxygen, a fuel supply unit which supplies fuel containing hydrogen to the electricity generator, and an oxygen source which supplies oxygen to the at least one electricity generator. The fuel supply unit comprises an outer tank defining an inner space, and an inner fuel storage tank with deformable walls which is provided in the inner space of the outer tank to store fuel. Fuel is discharged from the inner fuel storage tank by the deformation of the inner fuel storage tank by applying a compressive force to the inner space of the outer tank through the use of a biasing mechanism.

Abstract: A fuel cell system includes a stack having an electricity generator for receiving fuel and air to generate electrical energy, a fuel supply unit for supplying the fuel to the stack, a housing in which the stack is mounted, a fan unit for supplying external air to the interior of the housing for cooling the electricity generator, and a region wherein air heated while cooling the electricity generator and air discharged from the stack and containing moisture are mixed. The air that is mixed in the region is discharged from the region.

Abstract: The present invention is a stacked fuel cell system which is formed by stacking a plurality of electricity generators, each electricity generator having a membrane-electrode assembly and a separator provided with the membrane-electrode assembly. The stack comprises an aligner which is disposed at least one portion of the separator and which couples and aligns the plurality of electricity generators.

Abstract: A cooling apparatus of a fuel cell system includes a housing for providing a space for receiving an electricity generating unit and a cooling medium supply unit connected to the housing to supply the cooling medium to the electricity generating unit. The housing has a body having a space for receiving the electricity generating unit. A guide section is connected to the body to collect the cooling medium passing through electricity generating unit. An exhaust unit is connected to the guide section to exhaust the cooling medium to outside of the housing.

Abstract: A composite material for a bipolar plate of fuel cells is comprised of conductive carbon dispersed in polybenzoxazine matrix. The present invention also provides a composite material for preparing a bipolar plate for fuel cells comprising a polymer where a volume reduction percent is less than 5%, preferably 3%, and more preferably 1% after polymerization of the monomers with respect to total volume of the monomers before the polymerization thereof, and conductive carbon. The polymers of the present invention have good workability since there is little volume change during polymerization, and good mechanical and chemical properties, and they can be manufactured at a low cost.

Abstract: There is provided the reagent layer composition that can substantially reduce the measurement bias arising from hematocrits. The addition of fatty acid (4-20 carbons) and quaternary ammonium salt to a commonly used reagent layer composition composed of an enzyme, an electron transfer mediator, and several water soluble polymers not only reduce the hematocrit level-dependent bias but also provide very stable performance for an extended period of time. Disclosed are also various types of sub microliter sample volume electrochemical biosensors that are suitable to use with the reagent layer composition of present invention.

Abstract: There is provided electrochemical biosensors with a sample introducing part, comprising a sample introducing passage, an air discharge passage, and a void. The sample introducing passage communicates with the air discharge passage, and the void is formed at the point of communication. Also, disclosed is the electrochemical biosensor with the said sample introducing part and a fluidity determining electrode.