Abstract: A solid oxide fuel cell and a brazing method between a cell and a cap of a fuel cell capable of simplifying a brazing process relative to the related art are disclosed. Thus, improved production efficiency and an air seal while saving on the amount of filler metal used is achieved, by improving the structure of the sealing cap combined with the end of the cell. The solid oxide fuel cell includes a hollow tube type cell and a sealing cap combined with the end of the cell, the cap has a structure in which a passage tube which is in contact with a hollow portion of the cell is provided in the center of the cap and a combination tube combined with the cell end is integrally provided on the circumference of the passage tube to form a cell insertion space between the passage tube and the combination tube, and a brazing surface formed on the bottom of the cell insertion space and a filler metal diffusion space formed at the side of the brazing surface.

Abstract: A tubular fuel cell module having improved current collecting efficiency. In one embodiment, the fuel cell module includes: a fuel cell unit; a first current collector extending along an outer side of the fuel cell unit; and a second current collector wound around the first current collector and around the outer side of the fuel cell unit. Here, the outer side of the fuel cell unit is a curved outer side, the first current collector has a curved inner side facing the curved outer side of the fuel cell unit, and the curved inner side of first current collector is shaped to match the curved outer side of the fuel cell unit.

Abstract: A fuel tank and a cap device for the fuel tank. The fuel tank is connected to a fuel cell and includes a tank body having a fuel opening and a pin hole for maintaining an inside pressure, a floater positioned on a surface of the fuel stored in the tank body, and an air pipe connected to the pin hole and an upper part of the floater. The cap device includes a cap body having an inside transfer path for connecting an inlet opening for introducing the fuel and an outside transfer pipe, a fixed outer cap including a connector for fixing a discharge opening into which the transfer pipe is inserted, and an elastic opening/closing section in which the cap body is elastically compressible by the connector, and wherein the inside transfer path opens during the compression.

Abstract: A manifold device for a tube type solid oxide fuel cell including a manifold body including at least one of a first opening for fluid inflow and a second opening for fluid outflow; at least one of a first manifold unit in the manifold body, the first manifold unit distributing fluid flowing in the first opening portion into channels, and a second manifold unit in the manifold body, the second manifold unit integrating fluid flowing in channels out to the second opening; and a plurality of tube type ports, each tube type port having a tube type body contacting and protruding from an outer surface of the manifold body, being connected to and in fluid communication with the channels, and including a heat interception unit in a portion of the tube type body.

Abstract: A fuel cell stack that includes: stacked cells that generate electricity; an exchange plate disposed at a first side of the stacked cells, having a channel in fluid communication with an injection flow path and a discharge flow path, which extend between the cells; and a pump that is disposed at an opposing second surface of the stacked cells, to force coolant (air) through the injection flow path, the exchange plate, and the discharge flow path.

Abstract: An active material for a battery has a surface treatment layer that includes a conductive agent and at least one coating-element-containing compound selected from the group consisting of a coating-element-containing hydroxide, a coating-element-containing oxyhydroxide, a coating-element-containing oxycarbonate, a coating-element-containing hydroxycarbonate, and a mixture thereof.

Abstract: Provided is a positive electrode for a lithium secondary battery including a positive active material and a conductive agent comprising a plurality of plate-structured carbon particles.

Abstract: A fuel cell system includes a fuel supply, an air supply, a plurality of unit cells being stacked, and a stack. The stack includes: a plurality of unit cells, each comprising separators and a membrane assembly (MEA) disposed between the separators; a fuel inlet configured to introduce a fuel to the unit cell; an unreacted fuel outlet configured to emit unreacted fuel from the stack; a fuel bypass path; a fuel distribution path configured to distribute the fuel to each of the unit cells; and an unreacted fuel inducing path configured to channel the unreacted fuel to the unreacted fuel outlet.

Abstract: There are provided a pump of a noise suppression and vibration proof structure and a fuel cell system using the same. The fuel cell system includes at least one electricity generator including an electrolyte membrane and an anode and a cathode attached to the both surfaces of the electrolyte membrane to generate electricity energy by the electrochemical reaction between fuel containing hydrogen and oxidant supplied to the anode and the cathode, a fuel supplying unit including a pump for supplying the oxidant to the electricity generator, and a fixed frame that is provided on a lower frame and to which the pump is fixed. The pump is separated from the lower frame and is fixed to and combined with the fixed frame by the belt-shaped fixing member on the side surface of the fixing frame with a buffering member interposed. Therefore, it is possible to reduce the noise and vibration of the pump.

Abstract: Disclosed is a separator for a fuel cell stack. The separator includes a plate having a first opening and a second opening on a surface thereof. A field or a channel is formed on the surface of the plate. The field has a first end and a second end. A field inlet is formed on the surface of the plate and connects the first end of the field to the first opening, and a field outlet is formed on the surface of the plate and connects the second end of the field to the second opening. An area of a cross-section of the field inlet, which is cut perpendicular to the surface of the plate, is smaller than an area of a cross-section of the field outlet, which is cut perpendicular to the surface of the plate.

Abstract: A membrane-electrode assembly for a mixed reactant fuel cell system is provided. The membrane-electrode assembly does not require a separator that physically separates the membrane-electrode assemblies from each other in a stack. The membrane-electrode assembly of the present invention instead includes an electrode substrate that is disposed on a surface of an anode or a cathode of the membrane-electrode assembly. The electrode substrate has a flow path, through which a fuel and an oxidant are supplied. The fuel and oxidant are absorbed into the electrode substrate and further into the anode and the cathode. The fuel and the oxidant are selectively oxidized and reduced in the anode and the cathode, respectively, to produce electricity.

Abstract: A plate type fuel cell system includes: an electric generator including a membrane-electrode assembly having a plurality of anode electrodes and a plurality of cathode electrodes arranged on opposite surfaces of a proton-exchange membrane and spaced apart from each other; an anode separator facing the plurality of anode electrodes and having a fluid channel adapted to receive a hydrogen containing fuel; a cathode separator facing the plurality of cathode electrodes and having an air ventilating hole; a fuel distributor having an accommodating part defined by a rib to accommodate the anode separator and adapted to distribute the hydrogen containing fuel to each of the plurality of anode electrodes, the rib being partially cut out to define a rib cutting part; and a sealing member contained within the rib cutting part.

Abstract: A fuel cell stack including an electricity generator and end plates disposed at respective ends of the electricity generator, each of the end plates including first and second grooves extending at perpendicular directions and reinforcing members placed on the first and second grooves.

Abstract: A fuel cell system and a method for driving the fuel cell system are disclosed. In one aspect, the fuel cell system may include a fuel stack, a fuel supply unit, an oxidizer supply unit, a humidifying unit, and a controller configured to measure the temperature of unit cells within the fuel cell stack and configured to detect the lowest measured temperature. The fuel cell stack may include a membrane electrode assembly and a plurality of unit cells. The membrane electrode assembly may include a membrane, a cathode disposed at a first side of the membrane and an anode disposed at a second side of the membrane.

Abstract: Disclosed are a fuel cell system, and a method of driving the system. The fuel cell system includes a fuel cell stack having a plurality of unit cells producing electricity, a switching unit connecting the plurality of unit cells to a discharge resistor, a switching controller synchronously operated when the voltage of the fuel cell stack reaches an open circuit voltage after power generation of the fuel cell stack is stopped. The switching controller generates select control signals to control the switching unit. The fuel cell system further includes a sensing unit measuring respective cell voltages of the plurality of unit cells and generating cell voltage sensing signals to control activation periods of the select control signals.

Abstract: A method of driving a fuel cell system according to embodiments of the present invention includes supplying a first amount of oxidizer (which is less than a normal amount of oxidizer) to a fuel cell stack while continuously supplying fuel to the fuel cell stack, supplying a second amount of oxidizer (which is more than the normal amount) to the fuel cell stack, and supplying a third amount of oxidizer (which is the normal amount of oxidizer supplied in a normal driving state) to the fuel cell stack.

Abstract: A fuel cell system optimizing the ratio of width of a channel to a width of a rib forming a passage for supplying fuel and air, the ratio of width thereof to a height of a channel, and the number of passages, thereby improving the fuel diffusing performance and reducing a pressure drop therein is provided. The fuel cell system includes at least one stack for generating electrical energy by an electrochemical reaction between hydrogen and oxygen, a fuel supply portion for supplying fuel to the stack, and an oxygen supply portion for supplying oxygen to the stack. The stack is formed into a stacked configuration having a plurality of membrane electrode assemblies separated by separators. The separators have ribs which closely contact the adjacent membrane electrode assemblies and form channels through which the oxygen and hydrogen flow. The ratio of the width of a channel to the height of the same is between about 0.6 and about 0.8.

Abstract: A stack for a fuel cell includes a first collecting plate having a first electric polarity, a second collecting plate having a second electric polarity different from the first electric polarity, and at least one electricity generator located between the collecting plates. The at least one electricity generator is for generating electric energy due to electrochemical reaction between hydrogen and oxygen to be collected by the collecting plates. Coupling members press the at least one electricity generator in an airtight connection between the collecting plates. A terminal member protrudes from the second collecting plate and is electrically connected to the first collecting plate and insulated from the second collecting plate, such that the terminal member is used as a first terminal having the first polarity. The second collecting plate or a second terminal member may also be used as a second terminal having the second polarity.

Abstract: The polymer electrolyte membrane of the present invention includes a porous supporter having pores, and a metal ion adsorptive material and a proton conductive polymer which are present in the pores of the porous supporter.

Abstract: A fuel supply device for a fuel cell and a fuel cell system using the same that prevent H2O, used in reforming from reaching and collecting in the fuel cell stack. The fuel supply device for a fuel cell includes a fuel reformer adapted to generate reformate via a reforming reaction, a gas-liquid separator coupled to an outlet of the fuel reformer, the gas-liquid separator being adapted to receive the reformate and control a moisture amount included within the reformate, a pipe coupled to an outlet of the gas-liquid separator, the pipe being adapted to pass the reformate and a condensed water removing device coupled with the pipe, the condensed water removing device being adapted to prevent condensed water within the reformate within the pipe from passing to an outside.