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.

A battery that is an example of an electrical device according to the present disclosure includes: an electrical element having a current collector such as a battery element having a current collector; a lead terminal electrically connected to the current collector; a joining portion containing an electrically-conductive resin material and joining the current collector and the lead terminal to each other; and a heat-melting portion that is disposed between the joining portion and the lead terminal and that contains a solder material. The heat-melting portion may be in contact with the lead terminal. The joining portion may be in contact with the current collector and the heat-melting portion.

A method for producing a metallic interconnector for a fuel cell stack, including an air guiding surface with a first gas distributor structure and a fuel gas guiding surface with a second gas distributor structure, the first gas distributor structure and the second gas distributor structure each formed by grooves and webs, includes providing a sheet metal blank, forming the sheet metal blank by a plastic molding process, the first gas distributor structure and the second gas distributor structure being formed in such a manner that the grooves and webs of the first gas distributor structure are arranged complementary to the grooves and webs of the second gas distributor structure at a predeterminable percentage of area of the air guiding surface and the fuel gas guiding surface of at least 50% and at most 99%.

A method for producing a metallic interconnector for a fuel cell stack, including an air guiding surface with a first gas distributor structure and a fuel gas guiding surface with a second gas distributor structure, the first gas distributor structure and the second gas distributor structure each formed by grooves and webs, includes providing a sheet metal blank, forming the sheet metal blank by a plastic molding process, the first gas distributor structure and the second gas distributor structure being formed in such a manner that the grooves and webs of the first gas distributor structure are arranged complementary to the grooves and webs of the second gas distributor structure at a predeterminable percentage of area of the air guiding surface and the fuel gas guiding surface of at least 50% and at most 99%.

An alloy member includes a base member that includes a recess in a surface of the base member and is constituted by an alloy material containing chromium, an anchor portion is disposed in the recess and contains an oxide containing manganese and a covering layer is connected to the anchor portion and contains a low-equilibrium oxygen pressure element whose equilibrium oxygen pressure is lower than that of chromium.

An alloy member includes a base member that includes a recess in a surface of the base member and is constituted by an alloy material containing chromium, an anchor portion is disposed in the recess and contains an oxide containing manganese and a covering layer is connected to the anchor portion and contains a low-equilibrium oxygen pressure element whose equilibrium oxygen pressure is lower than that of chromium.

According to an embodiment, the aluminum sheet material for a separator of a fuel cell is used for forming a separator applied to a fuel cell stack and comprises 9-10 wt % of Mg; and the balance of Al and inevitable impurities, wherein the aluminum sheet material has cube texture and an R-cube texture formed therein. An aluminum sheet material for a separator in a fuel cell retains a thickness of 0.5 mm or less and exhibits excellent yield strength and elongation, and a manufacturing method therefor.

According to an embodiment, the aluminum sheet material for a separator of a fuel cell is used for forming a separator applied to a fuel cell stack and comprises 9-10 wt % of Mg; and the balance of Al and inevitable impurities, wherein the aluminum sheet material has cube texture and an R-cube texture formed therein. An aluminum sheet material for a separator in a fuel cell retains a thickness of 0.5 mm or less and exhibits excellent yield strength and elongation, and a manufacturing method therefor.

In a fuel cell stack, a separator includes, in a region adjacent to a coolant manifold of the unit cell in a planar direction, a sacrificial electrolytic corrosion region that is not adhered to an insulating sheet adjacent in a laminating direction, and a sealing region that is adjacent to the sacrificial electrolytic corrosion region in the planar direction and is adhered to the insulating sheet. The sacrificial electrolytic corrosion region includes a coolant lead-in or lead-out region and a region other than the coolant lead-in or lead-out region. A shape of the separator in the coolant lead-in or lead-out region is a flat plate shape that is in contact with the insulating sheet, and a shape of the separator in the region other than the coolant lead-in or lead-out region of is an uneven shape that is at least partially out of contact with the insulating sheet.

In a fuel cell stack, a separator includes, in a region adjacent to a coolant manifold of the unit cell in a planar direction, a sacrificial electrolytic corrosion region that is not adhered to an insulating sheet adjacent in a laminating direction, and a sealing region that is adjacent to the sacrificial electrolytic corrosion region in the planar direction and is adhered to the insulating sheet. The sacrificial electrolytic corrosion region includes a coolant lead-in or lead-out region and a region other than the coolant lead-in or lead-out region. A shape of the separator in the coolant lead-in or lead-out region is a flat plate shape that is in contact with the insulating sheet, and a shape of the separator in the region other than the coolant lead-in or lead-out region of is an uneven shape that is at least partially out of contact with the insulating sheet.