In certain aspects, electrolytic deposition and electroless displacement deposition methods are provided to form bimetallic structures that may be used as a bipolar current collector in a battery or a substrate for forming graphene sheets. In other aspects, bipolar current collectors for lithium-ion based electrochemical cells are provided. The bimetallic current collector may have an aluminum-containing surface and a continuous copper coating. In other aspects, a flexible substrate may be coated with one or more conductive materials, like nickel, copper, graphene, aluminum, alloys, and combinations thereof. The flexible substrate is folded to form a bipolar current collector. New stack assemblies for lithium-ion based batteries incorporating such bipolar current collectors are also provided that can have cells with a tab-free and/or weld-free design.

A surface treatment process for a metal article provides a uniform and unblemished surface finish to the metal article. The surface treatment process anodizes the metal article to form an anodic oxide layer on a surface, and the metal article is activated using a pre-dyeing solution. The pre-dyeing solution contains complex organic acid and sodium acetate. The anodic oxide layer of the metal article is dyed for color and the dyed anodic oxide layer of the metal article is finally sealed.

A production method of aluminum including: a step of synthesizing an aluminum compound from a mixture including a halogenated aluminum hydrate and a perfluoroalkylsulfonimide-type or perfluoroalkylsulfonamide-type ionic liquid represented by general formula (1); a step of dissolving the aluminum compound in a nitrile-based organic solvent to prepare an aluminum electrolyte; a step of adding at least one ligand selected from a phosphorus compound and an organic compound having an amide group to the aluminum electrolyte and dehydrating water molecules from a hydrate included in the aluminum electrolyte; and a step of electrodepositing aluminum on a cathode by allowing electricity to pass between an anode and the cathode in the aluminum electrolyte after the dehydrating step.

A production method of aluminum including: a step of synthesizing an aluminum compound from a mixture including a halogenated aluminum hydrate and a perfluoroalkylsulfonimide-type or perfluoroalkylsulfonamide-type ionic liquid represented by general formula (1); a step of dissolving the aluminum compound in a nitrile-based organic solvent to prepare an aluminum electrolyte; a step of adding at least one ligand selected from a phosphorus compound and an organic compound having an amide group to the aluminum electrolyte and dehydrating water molecules from a hydrate included in the aluminum electrolyte; and a step of electrodepositing aluminum on a cathode by allowing electricity to pass between an anode and the cathode in the aluminum electrolyte after the dehydrating step.

The present invention provides a zinc coating-forming method for drawing of metallic pipes, including a degreasing step of degreasing a material to be drawn, which is composed of any one of aluminum, an aluminum alloy, copper, and a copper alloy; a first oxidation step of forming an oxide coating on a surface of the material to be drawn, which has been degreased in the degreasing step; and a second oxidation step of forming a zinc coating on the material to be drawn, which has been coated with an oxide.

A plated wire rod material according to the present disclosure contains a substrate containing aluminum or an aluminum alloy, and a surface treatment coat including one or more metal layers and covering the substrate. Of the one or more metal layers, an undermost metal layer which is a metal layer formed on the substrate includes nickel, a nickel alloy, cobalt or a cobalt alloy. A mixed layer containing a metal component in the substrate, a metal component in the surface treatment coat and an oxygen component is present at an interface between the substrate and the surface treatment coat.

A plated wire rod material according to the present disclosure contains a substrate containing aluminum or an aluminum alloy, and a surface treatment coat including one or more metal layers and covering the substrate. Of the one or more metal layers, an undermost metal layer which is a metal layer formed on the substrate includes nickel, a nickel alloy, cobalt or a cobalt alloy. A mixed layer containing a metal component in the substrate, a metal component in the surface treatment coat and an oxygen component is present at an interface between the substrate and the surface treatment coat.

A heat dissipation component for a semiconductor element includes: a composite part containing 50-80 vol % diamond powder with the remainder having metal including aluminum, the diamond powder having a particle diameter volume distribution first peak at 5-25 m and a second peak at 55-195 m. A ratio between a volume distribution area at particle diameters of 1-35 m and a volume distribution area at particle diameters of 45-205 m is 1:9 to 4:6; surface layers on both composite part principal surfaces, each of the surface layers containing 80 vol % or more metal including aluminum and having a film thickness of 0.03-0.2 mm; and a crystalline Ni layer and an Au layer on at least one of the surface layers, the crystalline Ni layer having a film thickness of 0.5-6.5 m, and the Au layer having a film thickness of 0.05 m or larger.

A thermally stable component formed of a tempered aluminum alloy casting which reduced costs is provided. The aluminum alloy typically has an elongation of at least 8% after casting, which is preferred for self-piercing rivet processes. The aluminum alloy leaves a casting facility in the as-cast (F temper) condition. The cast aluminum alloy is then shipped to another entity, such as an OEM, and is subjected to an artificial aging process, such as on the OEM's existing paint line, rather than at the casting facility. The artificial aging process typically includes electrodeposition coating and curing. The components that can be formed by the reduced cost method include lightweight automotive vehicle components, including structural, body-in-white, suspension, or chassis components, such as front shock towers, front body hinge pillars, tunnels, and rear rails.

A thermally stable component formed of a tempered aluminum alloy casting which reduced costs is provided. The aluminum alloy typically has an elongation of at least 8% after casting, which is preferred for self-piercing rivet processes. The aluminum alloy leaves a casting facility in the as-cast (F temper) condition. The cast aluminum alloy is then shipped to another entity, such as an OEM, and is subjected to an artificial aging process, such as on the OEM's existing paint line, rather than at the casting facility. The artificial aging process typically includes electrodeposition coating and curing. The components that can be formed by the reduced cost method include lightweight automotive vehicle components, including structural, body-in-white, suspension, or chassis components, such as front shock towers, front body hinge pillars, tunnels, and rear rails.