Aluminum current collector with root-shaped structure for lithium battery and preparation method of aluminum current collector

The invention discloses an aluminum current collector with a root-shaped structure for a lithium battery and a preparation method of the aluminum current collector, relates to an aluminum current collector and a preparation method of the aluminum current collector, and aims to solve the technical problems of poor structural controllability, unstable performance, high preparation cost and serious environmental pollution of the aluminum current collector in the conventional method for improving the adhesive capacity of the aluminum current collector for the lithium battery. According to the aluminum current collector with the root-shaped structure for the lithium battery, through holes with consistent pore diameters are uniformly distributed in aluminum foil, cracks are distributed in the inner walls of the through holes, and the through holes with the cracks are of the root-shaped structure. The preparation method comprises the following steps: cleaning and drying the aluminum foil, carrying out laser etching