Abstract: The present invention relates to a secondary battery wherein a coating layer is formed by coating the surface of the outermost separator of an electrode assembly with a heat-resistant material, thereby preventing heat generated by abnormal heating of a battery cell from being transferred to the outside through a case or preventing external heat from being transferred to the inside of the battery cell.

Abstract: A semiconductor device includes a substrate, a first sheet pattern on the substrate, a gate electrode on the substrate and surrounding the first sheet pattern, a first source/drain pattern and a second source/drain pattern respectively connected to a first end and a second end of the first sheet pattern, a contact blocking pattern on a lower side of the second source/drain pattern, a first source/drain contact extending in a first direction and connected to the first source/drain pattern, and a second source/drain contact connected to the second source/drain pattern and extending in the first direction to contact an upper surface of the contact blocking pattern. A depth from an upper surface of the gate electrode to a lowermost portion of the first source/drain contact may be greater than a depth from the upper surface of the gate electrode to the upper surface of the contact blocking pattern.

Abstract: A method for manufacturing a semiconductor device and a semiconductor device produced thereby. For example and without limitation, various aspects of this disclosure provide a method for manufacturing a semiconductor device, and a semiconductor device produced thereby, that comprises an interposer without through silicon vias.

Abstract: A method for manufacturing a gas diffusion layer for a fuel cell wherein carbon nanotubes are impregnated into Korean paper, thereby enhancing electroconductivity, and a gas diffusion layer manufactured thereby. The method for manufacturing a gas diffusion layer for a fuel cell which is to manufacture a gas diffusion layer as a constituent member of a unit cell in a fuel cell, includes a support preparation step of preparing a support with Korean paper; a dispersion preparation step of dispersing a carbon substance in a solvent to form a dispersion, a coating step of coating the support with the dispersion, and a thermal treatment step of thermally treating the dispersion-coated support to fix the carbon substance to the support.

Abstract: Provided is a pixel driving circuit including a first circuit configured to control, in a data writing mode, a signal related to driving of one or more light-emitting elements, and a second circuit configured to supply, in a driving mode, power to the one or more light-emitting elements based on a signal transmitted from the first circuit.

Abstract: An embodiment electrified vehicle charging system includes an actuator configured to maintain or change a vertical position, a horizontal position, or an angle of a power receiver provided in a vehicle and a position controller configured to determine a relative position and a relative angle of the power receiver relative to a power transmitter provided outside of the vehicle through a sensor and to perform an alignment control between the power transmitter and the power receiver through the actuator based on the relative position and the relative angle of the power receiver.

Abstract: One embodiment provides a gas diffusion layer for a fuel cell constituting a unit cell of the fuel cell. The gas diffusion layer includes a base layer that includes short carbon fibers and has a reinforcing portion formed in a predetermined area thereof in a thickness direction with continuous carbon fibers oriented in the reinforcing portion. The reinforcing portion is formed adjacent to a first surface of the base layer. A micro porous layer is formed on the first surface of the base layer.

Abstract: Disclosed is a jig for surface treatment of a separator which is used to partially form a coating layer on a surface of the separator in which each land and each channel are alternately and repeatedly formed on one side and the other side according to a concavo-convex shape. In particular, the jig includes: a first jig which has a first plate part disposed on the one side of the separator and first mask parts protruding from the first plate part to cover an inner surface of one side-channel; and a second jig that has a second plate part disposed on the other side of the separator and second mask parts protruding from the second plate part to cover an inner surface of the other side-channel.

Abstract: An open-cathode-type fuel cell system includes hollow fiber membranes, through which moisture contained in unreacted hydrogen discharged from a fuel cell stack is transferred to air flowing into the fuel cell stack, and an aerial vehicle using the same. The open-cathode-type fuel cell system includes a fuel cell stack configured to generate electricity through a reverse electrolysis reaction using hydrogen and air supplied from the outside, a humidifying structure disposed on one side of the fuel cell stack in order to transfer moisture included in unreacted hydrogen, discharged from the fuel cell stack, to air flowing into the fuel cell stack, and a cooling fan disposed on the other side of the fuel cell stack in order to discharge unreacted air, discharged from the fuel cell stack, and cooling air to the outside. Accordingly, the performance of the air-cooled fuel cell system may be improved.

Abstract: A multiple perforation plate for a separator of a fuel cell is provided. The multiple perforation plate is disposed between the separator having a flat plate shape and a gas diffusion layer to form flow paths for a reaction gas, and the multiple perforation plate includes a porous hole region having an uneven shape repeatedly formed therein and provided with a plurality of flow path holes configured to allow the reaction gas to flow in a turbulent way, and a channel region forming a flow path configured to allow the reaction gas to flow along a flow direction of the reaction gas in a straight way, wherein the porous hole region and the channel region are alternately disposed and integrally formed.

Abstract: A method for producing a gas diffusion layer for a fuel cell, includes a substrate preparation step of preparing a substrate for the gas diffusion layer; a slurry preparation step of preparing a slurry for a microporous layer containing carboxymethyl cellulose (CMC) and polytetrafluoroethylene (PTFE) diffused in solvent; a microporous layer forming step of forming a microporous layer by applying the slurry onto the substrate; and a heat-treatment step of controlling the hydrophobicity of the gas diffusion layer by heating the substrate having the microporous layer applied thereonto. Also disclosed is a gas diffusion layer produced thereby. The method may control the hydrophobicity of the gas diffusion layer by variably controlling the heat-treatment temperature.

Abstract: A gas diffusion layer for a fuel cell constituting a unit cell of the fuel cell includes a base layer including short carbon fibers and having a reinforcing portion formed in a predetermined area thereof in a thickness direction with continuous carbon fibers oriented in the reinforcing portion. One method of manufacturing the gas diffusion layer includes preparing a mixed dispersion in which short carbon fibers are mixed, orienting continuous carbon fibers on a conveyor belt, forming a paper having a reinforcing portion in which the continuous carbon fibers are oriented by supplying the prepared mixed dispersion to the conveyor belt on which the continuous carbon fibers are oriented, and forming a base layer by impregnating the paper with a hydrophobic agent.

Abstract: Disclosed is a gas diffusion layer for a fuel cell that may be made thinner by integrally forming a base and a fine pore layer, and a method for manufacturing the same. A gas diffusion layer for a fuel cell which constitutes a unit cell of the fuel cell includes: a base layer formed by impregnating a first slurry, in which carbon powder and polytetrafluoroethylene (PTFE) are mixed, in the interior of a carbon fiber base; and a fine pore layer formed by coating a second slurry, in which carbon powder and polytetrafluoroethylene (PTFE) are mixed and which has a viscosity that is higher than the viscosity of the first slurry, on a surface of the base layer.

Abstract: Disclosed is a power factor correction circuit including a plurality of legs connected in parallel and each leg including two switching devices connected in series, a plurality of inductors, each inductor having one terminal connected to an interconnection node of the two switching devices in a corresponding one of the plurality of legs, and a controller configured to control on/off states of the switching devices of the plurality of legs in a pulse width modulation manner such that each of the inductors of the plurality of inductors is built up twice or more in one switching period of the switching devices when an alternating current (AC) voltage is input to the other terminal of each inductor of the plurality of inductors.

Abstract: A multiple perforation plate for a separator of a fuel cell is provided. The multiple perforation plate is disposed between the separator having a flat plate shape and a gas diffusion layer to form flow paths for a reaction gas, and the multiple perforation plate includes a porous hole region having an uneven shape repeatedly formed therein and provided with a plurality of flow path holes configured to allow the reaction gas to flow in a turbulent way, and a channel region forming a flow path configured to allow the reaction gas to flow along a flow direction of the reaction gas in a straight way, wherein the porous hole region and the channel region are alternately disposed and integrally formed.

Abstract: A united converter apparatus and an operating method thereof are disclosed. The united converter apparatus includes a high-voltage charger charging a high-voltage battery, using a commercial power and a low-voltage charger charging a low-voltage battery, using the high-voltage battery. The high-voltage charger includes a voltage level adjustment device boosts a voltage of the commercial power to apply the boosted voltage to the high-voltage battery and drops a high voltage applied from the high-voltage battery to apply the dropped voltage to the low-voltage charger.

Abstract: Disclosed is a gas diffusion layer for a fuel cell that may be made thinner by integrally forming a base and a fine pore layer, and a method for manufacturing the same. A gas diffusion layer for a fuel cell which constitutes a unit cell of the fuel cell includes: a base layer formed by impregnating a first slurry, in which carbon powder and polytetrafluoroethylene (PTFE) are mixed, in the interior of a carbon fiber base; and a fine pore layer formed by coating a second slurry, in which carbon powder and polytetrafluoroethylene (PTFE) are mixed and which has a viscosity that is higher than the viscosity of the first slurry, on a surface of the base layer.

Abstract: Disclosed is a power factor correction circuit including a plurality of legs connected in parallel and each including two switching devices connected in series, a plurality of inductors each having one terminal connected to an interconnection node of the two switching devices in a corresponding one of the legs, and a controller configured to control on/off states of the switching devices in a pulse width modulation manner such that each of the inductors is built up twice or more in one switching period of the switching devices when an alternating current (AC) voltage is input to the other terminal of each of the inductors.

Abstract: A united converter apparatus and an operating method thereof are disclosed. The united converter apparatus includes a high-voltage charger charging a high-voltage battery, using commercial power and a low-voltage charger charging a low-voltage battery, using the high-voltage battery. The high-voltage charger includes a voltage level adjustment device boosts a voltage of the commercial power to apply the boosted voltage to the high-voltage battery and drops a high voltage applied from the high-voltage battery to apply the dropped voltage to the low-voltage charger.

Abstract: In one embodiment, a gas diffusion layer for fuel cells includes a fine porous layer formed on a carbon fiber support and being interposed between a membrane-electrode assembly (MEA) and a separator. The carbon fiber support includes a fine pore area having a predetermined average pore size in a separator direction (thickness direction) in the membrane electrode assembly, and a coarse pore area having a larger predetermined average pore size than the average pore size of the fine pore area in the separator direction (thickness direction) in the membrane electrode assembly. The fine pore area and the coarse pore area are alternately formed.