Abstract: A separator for a fuel cell includes: a metal base material; and a carbon coating layer formed on one surface or both surfaces of the metal base material, in which roughness Ra formed at an interface between the metal base material and the carbon coating layer may be in a range of 20 to 78 nm.

Abstract: A gasket for a fuel cell having plurality of protrusions coupled to a surface of a separation plate of the fuel cell and protruding from an air-tight line blocking movement between materials flowing along a plurality of manifolds, in a length direction of the separation plate is provided. In particular, each of the plurality of protrusions includes a groove having a set width.

Abstract: A separator for a fuel cell includes a plurality of channels; and an inlet hole and an outlet hole formed in a first side and a second side of the plurality of channels, respectively, such that a reaction gas flows into and out from the separator to be exposed to a reaction surface including a membrane electrode assembly. The inlet hole is larger in size than the outlet hole.

Abstract: A method for manufacturing a separator of a fuel cell stack includes: forming a gasket on the separator of the fuel cell stack; masking a surface of the separator except for a region of the surface of the separator on which the gasket is formed; and inserting the partially masked separator into a chamber to cross-link the gasket.

Abstract: A fuel cell that includes a membrane-electrode assembly and separation plates disposed on both sides of the membrane-electrode assembly is provided. The fuel cell includes barrier ribs formed in reaction surfaces of the separation plates corresponding to the membrane-electrode assembly and configured to partition the reaction surfaces into a plurality of reaction regions. A micropore body is installed between the separation plate and the membrane-electrode assembly. The micropore body includes porous units disposed in the reaction region, and a connection unit integrally coupled to the porous units and flatly contacts the barrier ribs.

Abstract: A fuel cell includes a separator plate including manifold holes formed in opposite sides thereof, a plurality of flow-path lands protruding between the manifold holes, a plurality of flow-path channels between the flow-path lands, and a plurality of communication holes formed between ends of the flow-path channels and the manifold holes, and a gasket coupled to the separator plate, and a plurality of separating portions protruding from the blocking portion into gaps between the neighboring communication holes so as to separate the communication holes from one another, wherein ends of the flow-path lands that do not face the separating portions extend toward the communication holes farther than do ends of the flow-path lands that face the separating portions.

Abstract: A structure of a fuel cell includes a sub-gasket coupled to both sides of a membrane electrode assembly; a plurality of gaskets protruding from a separator to form a flow space between the sub-gasket and the separator and supporting the sub-gasket; and a supporting member coupled to the sub-gasket at a position corresponding to the flow space, the supporting member preventing the sub-gasket from being deformed and being formed in a flat shape.

Abstract: A separator for a fuel cell includes a plurality of channels; and an inlet hole and an outlet hole formed in a first side and a second side of the plurality of channels, respectively, such that a reaction gas flows into and out from the separator to be exposed to a reaction surface including a membrane electrode assembly. The inlet hole is larger in size than the outlet hole.

Abstract: A fuel cell and a method for producing the same are provided. The fuel cell includes a membrane electrode assembly and a gas diffusion layer that is disposed at each of opposite surfaces of the membrane electrode assembly, and includes a plurality of compressed parts that are formed by pressure at positions spaced out at predetermined intervals on the gas diffusion layer. The fuel cell further includes a separator that is in contact with an outer surface of the gas diffusion layer, and has a plurality of land parts that protrude toward the gas diffusion layer, and a plurality of channel parts that form flow paths between the land parts. The land parts respectively protrude toward the compressed parts of the gas diffusion layer to come in contact with the compressed parts.

Abstract: The present invention provides a fuel cell separator with a gasket manufactured by integrally forming a gasket on one side of a separator; independently injection molding a frame gasket on a frame such that a first airtight portion covers the entire surface of the frame to maintain the shape of the frame gasket and a second airtight portion projects upward and downward from both ends of the first airtight portion; and bringing the first airtight portion of the frame gasket into contact with the other side of the separator with the gasket formed on one side thereof. To create a fuel cell stack in certain embodiments, the invention stacks the second airtight portion of the frame gasket on another second airtight portion of an adjacent unit cell with a membrane-electrode assembly interposed therebetween.

Abstract: A fuel cell is provided which includes a catalyst layer to which hydrogen gas or air are introduced through both surfaces thereof a first separator disposed at a first side of the catalyst layer and including a plurality of first channels such that a first reactant among hydrogen gas or air flows; and a second separator disposed at the second side of the catalyst layer and including a plurality of second channels disposed in a direction perpendicular to the first channels. Particularly, each of the second channels includes a plurality of ventilation apertures such that a second reactant among the hydrogen and the air flows in a direction perpendicular to the second channels.

Abstract: A separator assembly for a fuel cell having an anode separator, a cathode separator, a cooling surface frame, and a gasket. In particular, the cooling surface frame is integrally bonded between peripheral portions of the anode separator and the cathode separator. Additionally, the gasket encloses the peripheral portions of the anode separator and the cathode separator between which the cooling surface frame is interposed.

Abstract: A fuel cell includes a separator plate including manifold holes formed in opposite sides thereof, a plurality of flow-path lands protruding between the manifold holes, a plurality of flow-path channels between the flow-path lands, and a plurality of communication holes formed between ends of the flow-path channels and the manifold holes, and a gasket coupled to the separator plate, and a plurality of separating portions protruding from the blocking portion into gaps between the neighboring communication holes so as to separate the communication holes from one another, wherein ends of the flow-path lands that do not face the separating portions extend toward the communication holes farther than do ends of the flow-path lands that face the separating portions.

Abstract: A porous panel for a separator of a fuel cell includes a plate-shaped material and uneven lines repeatedly arranged on the porous panel in a direction crossing a gas flow direction. The porous panel is bent at the uneven lines such that upward and downward uneven portions are repeated, and through holes permitting passage of gas formed on opposite sides of each of the uneven lines have an uneven shape.

Abstract: A fuel cell includes a reaction layer including: a membrane electrode assembly (MEA); and gas diffusion layers (GDLs) each of which is disposed at both side surfaces of the MEA. A porous separation layer has one surface adhered to one surface of the reaction layer and supplied with reaction gas, and a cathode bipolar plate has a panel shape and adhered to another surface of the porous separation layer. A front end part of the cathode bipolar plate having a manifold that is supplied with the reaction gas and having a plurality of diffusion channels through which the reaction gas directs from the manifold toward the porous separation layer. The cathode bipolar plate has a partition wall channel which separates the porous separation layer, which extends in a direction in which the reaction gas flows, and which extends from the manifold in a diagonal direction.

Abstract: A separator for a fuel cell is provided. The separator is disposed at both sides of a membrane-electrode assembly and is configured to supply a reaction gas to the membrane-electrode assembly. In addition, the separator includes a conductive microporous body that is formed on a reaction surface corresponding to the membrane-electrode assembly and a channel unit that is connected to an inlet manifold and an outlet manifold through which the reaction gas flows and is configured to guide the reaction gas to the reaction surface.

Abstract: An apparatus for manufacturing a gas diffusion layer for fuel cells includes: a conveyer transferring a base sheet for a macroporous layer of the gas diffusion layer in one direction before water repellent coating; a nozzle disposed around the conveyer to coat the transferring base sheet with a water repellent in a fiber type or desired pattern; and a nozzle transfer unit combined with an upper end of the nozzle to transfer the nozzle along a desired trajectory.

Abstract: A method for coating a separator for a fuel cell is provided that includes vaporizing a metal carbide precursor to obtain a precursor gas; introducing a metal carbide coating layer-forming gas including the precursor gas in a reaction chamber; and applying a voltage to the reaction chamber so that the precursor gas is changed into a plasma state, thereby forming a metal carbide coating layer on either surface or both surfaces of a substrate. In this case, the metal carbide precursor may include a compound having a substituted or non-substituted cyclopentadienyl group.

Abstract: A fuel cell stack includes a first separator and a second separator that are adhered to face each other between adjacent membrane electrode assemblies (MEAs) and each have a plurality of manifolds, a reacting region, and a guide region disposed between the plurality of manifolds and the reacting region. In the fuel cell stack, a first cooling medium guide channel guiding flow of a cooling medium between the plurality of manifolds and the reacting region is formed in the guide region of the first separator; a second cooling medium guide channel guiding flow of the cooling medium between the plurality of manifolds and the reacting region is formed in the guide region of the second separator; and at least portions of the first cooling medium guide channel and the second cooling medium guide channel overlap to communicate with each other.

Abstract: Disclosed is a gasket structure for a fuel cell separator with an improved air tight seal/sealability. The gasket structure includes first and second main lines and a plurality of sub lines. The first and second main lines are disposed in a horizontal direction in the separator on different lines of a reaction surface and a cooling surface of the separator, respectively. The plurality of sub lines are disposed in a vertical direction of the separator on both surfaces at a uniform interval. Here, the first and second main lines and the plurality of sub lines integrally form a gate for reactance gases and cooling water, and a plurality of vacant spaces are formed to have a uniform size on the first and second main lines.