POSITIVE ELECTRODE CURRENT COLLECTOR FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

A cathode current collector for a lithium secondary battery according to embodiments of the present disclosure may include an aluminum layer, aluminum-copper alloy layers formed on the aluminum layer, and copper layers formed on the aluminum-copper alloy layer. Accordingly, even when a high-density cathode active material layer is formed on the cathode current collector, deformation or fracture of the cathode current collector may be prevented, thereby improving the cycle life of the secondary battery.