High-strength and high-elongation aluminum foil as well as preparation method and application thereof

The invention discloses a high-strength and high-elongation aluminum foil as well as a preparation method and application thereof, and belongs to the technical field of lithium batteries. According to the high-strength and high-elongation aluminum foil, an EBSD detection means is adopted, the grain size of the aluminum foil with the thickness of 0.010-0.020 mm is 4-7 microns, the proportion of the number of annealing textures of the aluminum foil is 35-50%, the aluminum foil is prepared by adopting a cast-rolling method with a specific annealing process through control over the grain size of the aluminum foil and the proportion of the number of the annealing textures, the strength of the aluminum foil can reach 250-276 MPa, and the tensile strength of the aluminum foil can reach 250-276 MPa. The aluminum foil for the current collector of the lithium battery can fully meet the performance requirement of the aluminum foil for the current collector of the lithium battery, and is widely applied to the technical f