Method for Manufacturing Cathode for Lithium Secondary Battery, and Cathode

A method for manufacturing a positive electrode for a lithium secondary battery includes: (S) forming a positive electrode active material layer by applying a positive electrode slurry composition comprising lithium iron phosphate and a binder onto a current collector and drying it; (S) rolling a positive electrode active material layer N times (N is an integer greater than or equal to 2). In the rolling step during the first rolling, the rate of change in thickness of a positive electrode active material layer according to Equation 1 below is 5% to 15%, and during subsequent rolling, the rate of change in thickness of a positive electrode active material layer according to Equation 1 below is 3.5% or less.