Metal foil for current collector of secondary battery and method for producing the same

摘要

A metal foil for a current collector of a secondary battery formed by electrodeposition and has a thickness (T) of 8 to 40 mum, the metal foil satisfying the following formulae: 4.9x10<8><=TxSxY<=31X10<8> 4.5<=epsilon-(0.0005xT<2>)<=15 where S is a breaking strength (MPa), epsilon is a tensile elongation (%) and Y is a Young's modulus (MPa). This foil is preferably a nickel foil and is manufactured by softening or annealing the metal foil obtained by electrodeposition. Thereby, a metal foil for a negative electrode of a secondary battery is obtained with an excellent capability of supporting the active material and large electric conductivity.