[TECHNICAL PROBLEM] To Provide a negative electrode for an electrical device such as a Li ion secondary battery that has a high initial capacity and exhibits good balance characteristics while maintaining high cycle characteristics. [SOLUTION TO PROBLEM] A...

Provision of an electrolytic copper alloy foil having large mechanical strength in an ordinary state and showing resistant to heat deterioration even when it is heated to 300°C or more. That electrolytic copper foil is an electrolytic copper alloy foil wh...

Disclosed is steel for a solid oxide fuel cell, which has excellent oxidation resistance, reduces Cr evaporation, has good electrical conductivity and has a thermal expansion coefficient similar to that of a ceramic component such as an electrolyte or an e...