Disclosed is a method for manufacturing a fuel cell separator having minimized surface defect via surface polishing using high-pressure injection, in which surface polishing is performed using a high-pressure injection scheme in which polishing-fluid is injected at high-pressure through a polishing-fluid injection nozzle before performing vision inspection, thereby minimizing the surface defect of the fuel cell separator.

The present disclosure relates to a separator plate for an electrochemical system. The electrochemical system may be, for example, a fuel cell system, an electrochemical compressor, or an electrolyzer.

A load receiver member of a fuel cell separator member of a fuel cell stack includes an attachment portion disposed between an outer peripheral portion of a first metal separator and an outer peripheral portion of a second metal separator, and a tab continuous with the attachment portion and protruding from an outer peripheral portion of a joint separator. The attachment portion is joined to the outer peripheral portion of the joint separator by a joint portion.

A load receiver member of a fuel cell separator member of a fuel cell stack includes an attachment portion disposed between an outer peripheral portion of a first metal separator and an outer peripheral portion of a second metal separator, and a tab continuous with the attachment portion and protruding from an outer peripheral portion of a joint separator. The attachment portion is joined to the outer peripheral portion of the joint separator by a joint portion.

Provided are a low-price fuel cell separator with high corrosion resistance and a method for manufacturing the separator. The present disclosure relates to a fuel cell separator including a metal substrate and a titanium layer containing titanium formed on the metal substrate, and a method for manufacturing the separator. A ratio of a (100) plane to a sum of values obtained by dividing peak intensities of the (100) plane, a (002) plane, and a (101) plane derived from titanium in an X-ray diffraction analysis of a separator surface by respective relative intensities is a constant value or more.

The present embodiment is a fuel cell including a stacked body of single cells each of which includes a power generating unit and separators disposed on both surfaces of the power generating unit, in which the separators each include a metal base material, a carbon layer made of carbon and formed on a first surface of the metal base material on a power generating unit side, and a titanium nitride layer made of titanium nitride and formed on a second surface of the metal base material opposite to the first surface.

The present embodiment is a fuel cell including a stacked body of single cells each of which includes a power generating unit and separators disposed on both surfaces of the power generating unit, in which the separators each include a metal base material, a carbon layer made of carbon and formed on a first surface of the metal base material on a power generating unit side, and a titanium nitride layer made of titanium nitride and formed on a second surface of the metal base material opposite to the first surface.

A progressive pressing method includes: a first bead molding step of molding a first bead having a length of a second predetermined distance extending in a longitudinal direction of the elongated metal plate, in a side part of a region which becomes a first product part of the elongated metal plate; a first conveying step of conveying the elongated metal plate in the longitudinal direction by a feed amount which is a first predetermined distance; and a second bead molding step of molding a second bead having a length of the second predetermined distance extending in the longitudinal direction of the elongated metal plate, so as to link with the first bead molded in the first bead molding step, in a side part of a region which becomes a second product part of the elongated metal plate, in which the second predetermined distance is longer than the first predetermined distance.

A progressive pressing method includes: a first bead molding step of molding a first bead having a length of a second predetermined distance extending in a longitudinal direction of the elongated metal plate, in a side part of a region which becomes a first product part of the elongated metal plate; a first conveying step of conveying the elongated metal plate in the longitudinal direction by a feed amount which is a first predetermined distance; and a second bead molding step of molding a second bead having a length of the second predetermined distance extending in the longitudinal direction of the elongated metal plate, so as to link with the first bead molded in the first bead molding step, in a side part of a region which becomes a second product part of the elongated metal plate, in which the second predetermined distance is longer than the first predetermined distance.

A bipolar plate for a PEM hydrogen fuel cell is coated with a carbon-containing coating, the carbon-containing coating comprising in order: a) a titanium seed layer; b) a titanium nitride interfacial layer; and c) a a-C top layer, and wherein the bipolar plate is formed from stainless steel. Methods for making such coated plates are described. The a-C has a density of greater than 2.0 g/cm3, a molar hydrogen content of 5% or less, an sp2 carbon content of 40% to 80% and an sp3 carbon content of 20% to 60%. The coated plates possess good electrical conductivity and are resistant to corrosion.