Abstract: The method for coating a separator for a fuel cell according to one form of the present disclosure includes the steps of: vaporizing a metal nitride precursor to obtain a precursor gas; introducing a metal nitride coating layer-forming gas containing the precursor gas and a reactive gas to a reaction chamber; applying a voltage to the reaction chamber so that the precursor gas and reactive gas may be converted into a plasma state, thereby forming a metal nitride coating layer on a substrate; introducing a carbon layer-forming gas containing a carbonaceous gas to the reaction chamber; and applying a voltage to the reaction chamber so that the carbonaceous gas may be converted into a plasma state, thereby forming a carbon coating layer on the metal nitride coating layer.

Abstract: A method for manufacturing a unit cell for a fuel cell includes preparing a separator having a reaction area located to correspond to an anode or a cathode of the unit cell, a first protrusion protruding from the separator, and a second protrusion spaced apart from the first protrusion with the reaction area interposed therebetween. The method includes providing a passage configured to guide a reaction gas to flow in the reaction area, and arranging a porous passage having a height protruding to become farther away from the separator and to be higher than the first and second protrusions between the first and second protrusions in parallel. The method includes compressing the porous passage toward the separator. The porous passage is fixed to the separator via the first and second protrusions by a force applied between the porous passage and the protrusion as the passage is deformed or is apt to be deformed to be lengthened in a transverse direction due to the compression of the porous passage.

Abstract: A separator for a fuel cell includes a channel having a passage that is a flow path of a reaction gas, a manifold part formed at a peripheral of the channel and communicating with the passage such that the reaction gas is introduced into and discharged from the channel, and a connector connecting the channel and the manifold part such that the reaction gas flows between the channel and the manifold part. The manifold part includes an inlet manifold through which the reaction gas is introduced into the channel and formed at a lower portion of the channel, and an outlet manifold configured to discharge the reaction gas from the channel to an outside of the fuel cell and formed at an upper portion of the channel.

Abstract: A fuel cell separator with a gasket for improved sealing is provided. The fuel cell separator with a gasket is capable of improving the contact pressure of a cooling surface-side airtight line by additionally forming a sub-airtight line in a region in which a gas aperture is not formed at a cooling surface-side position that corresponds to the cooling surface-side airtight line of the separator.

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 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: The method for coating a separator for a fuel cell according to one form of the present disclosure includes the steps of: vaporizing a metal nitride precursor to obtain a precursor gas; introducing a metal nitride coating layer-forming gas containing the precursor gas and a reactive gas to a reaction chamber; applying a voltage to the reaction chamber so that the precursor gas and reactive gas may be converted into a plasma state, thereby forming a metal nitride coating layer on a substrate; introducing a carbon layer-forming gas containing a carbonaceous gas to the reaction chamber; and applying a voltage to the reaction chamber so that the carbonaceous gas may be converted into a plasma state, thereby forming a carbon coating layer on the metal nitride coating layer.

Abstract: A unit cell for a fuel cell includes a separator having a reaction area located to correspond to an anode or a cathode of a membrane electrode assembly, an inlet manifold, which is provided outside the reaction area and into which a reaction gas is introduced that is to be supplied to the reaction area, and an outlet manifold which is spaced apart from the inlet manifold and through which the reaction gas that passed through the reaction area is discharged. The unit cell has a porous passage provided between the separator and the membrane electrode assembly arranged to be adjacent to the separator and having a passage configured to guide the reaction gas introduced into the inlet manifold such that the reaction gas is discharged to the outlet manifold via the reaction area. The unit cell has a protrusion protruding from the separator toward the porous passage, which is fixed to the separator by the protrusion through a pressing force, which is generated due to deformation by a compressive force.

Abstract: A separator for a fuel cell includes a channel having a passage that is a flow path of a reaction gas, a manifold part formed at a peripheral of the channel and communicating with the passage such that the reaction gas is introduced into and discharged from the channel, and a connector connecting the channel and the manifold part such that the reaction gas flows between the channel and the manifold part. The manifold part includes an inlet manifold through which the reaction gas is introduced into the channel and formed at a lower portion of the channel, and an outlet manifold configured to discharge the reaction gas from the channel to an outside of the fuel cell and formed at an upper portion of the channel.

Abstract: A fuel cell includes a membrane electrode assembly including a first electrode layer formed at one side of an electrolyte layer and a second electrode layer formed at another side of the electrolyte layer, a metallic forming body compressed after being form-molded, the metallic forming body being stacked on at least one of the first and second electrode layers, and the metallic forming body supplying reaction gas to at least one of the electrode layers through inner pores, and a bipolar plate stacked on the metallic forming body.

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 separator with a gasket for improved sealing is provided. The fuel cell separator with a gasket is capable of improving the contact pressure of a cooling surface-side airtight line by additionally forming a sub-airtight line in a region in which a gas aperture is not formed at a cooling surface-side position that corresponds to the cooling surface-side airtight line of the separator.

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 slip sheet for a fuel cell stack that includes a plurality of spaced fluid channel support protrusions protruding from a main body, at portions which face fluid channel protrusions of a separator plate in such a manner that the spaced fluid channel support protrusions come into contact with the fluid channel protrusions of the separator plate.

Abstract: A separator for a fuel cell and a method for manufacturing the same comprise two sheets of metal plates integrally formed to minimize contact resistance between an upper metal plate and a lower metal plate. The method for manufacturing the separator includes steps of preparing an upper metal plate and a lower metal plate, each plate having opposing main sides, and applying a coating liquid containing a polymer composite material on both sides of the upper and lower metal plates, to form first and second composite material layers on both sides of the upper plates and third and fourth composite material layers on both sides of the lower plates. The method further includes stacking the upper metal plate on the lower metal plate, before drying the respective composite material layers, and integrally bonding the second composite material layer and the third composite material layer to form a single intermediate composite material layer.

Abstract: The method for coating a separator for a fuel cell according to one form of the present disclosure includes the steps of: vaporizing a metal nitride precursor to obtain a precursor gas; introducing a metal nitride coating layer-forming gas containing the precursor gas and a reactive gas to a reaction chamber; applying a voltage to the reaction chamber so that the precursor gas and reactive gas may be converted into a plasma state, thereby forming a metal nitride coating layer on a substrate; introducing a carbon layer-forming gas containing a carbonaceous gas to the reaction chamber; and applying a voltage to the reaction chamber so that the carbonaceous gas may be converted into a plasma state, thereby forming a carbon coating layer on the metal nitride coating layer.

Abstract: A fuel cell system and a method for driving a fuel cell system are disclosed. The fuel cell system includes a fuel cell stack with a plurality of unit cells, a temperature measurer configured for determining a temperature of the fuel cell stack, a cell voltage measurer configured for determining voltages of one or more of the plurality of unit cells, and a control unit configured for monitoring the unit cell voltages of the plurality of unit cells to detect a minimum unit cell voltage when a measured temperature of the fuel cell stack is below zero, and configured for controlling the load current so that the detected minimum unit cell voltage may be maintained at a predetermined threshold voltage.

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 stack for a fuel cell system, including: a membrane electrode assembly, a separator that includes a fuel passage that supplies a fuel to an anode electrode of the membrane electrode assembly and an oxidant passage that supplies an oxidant to a cathode electrode of an adjacent membrane electrode assembly, a first manifold that is formed by connecting first penetration holes that penetrate the separator in a stacking direction and that is connected to the fuel passage, a second manifold that is formed by connecting second penetration holes that penetrate the separator in the stacking direction and that is connected to the oxidant passage and a baffle that is disposed in at least one of the first manifold and the second manifold. The baffle has a membrane structure to control the fluid flow inside of the at least one of the first manifold and the second manifold.

Abstract: A fuel cell stack including a dummy cell for effectively discharging condensate water of the stack is provided. At least one cathode/anode dummy cell is stacked between a reaction of a stack power generator and end plates at both ends of the stack to discharge water out of stack. An automation process of the whole stack according to a simplified stack configuration can be achieved.