Alloy foil and preparation method thereof, current collector, electrode, secondary battery and electric device

The invention provides an alloy foil and a preparation method thereof, a current collector, an electrode, a secondary battery and an electric device, the alloy foil comprises a copper element and a nickel element, the mass ratio of the nickel element in the alloy foil is 0.1-15%, and the thickness of the alloy foil is 0.7-6 [mu] m. The alloy foil provided by the invention has relatively good structural integrity and uniformity, and is beneficial to improving the structural stability of the current collector, so that the cycling stability of the secondary battery can be improved.