Lithium secondary battery, method for producing current collector foil for lithium secondary battery, and current collector foil for lithium secondary battery

摘要

It is a manufacturing method capable of preventing the active material from peeling and preventing the generation of the processed metal powder of the current collector foil in the electrode manufacturing process. The method for manufacturing a lithium secondary battery is an electrode manufacturing process for manufacturing a positive electrode and a negative electrode. And a step of forming an electrode group by laminating or winding the positive electrode and the negative electrode through a separator, and a step of immersing the electrode group in an electrolytic solution. A drilling step of forming a plurality of through-holes having a projecting portion that penetrates and protrudes to at least one of the current collector foil surfaces; and a mixture forming step of forming a mixture layer on the current collector foil, and The mixture forming step is continuously performed without winding up the current collector foil perforated after the perforating step.