Manufacturing method of negative electrode

Abstract

A manufacturing method of a negative electrode includes: forming, on a belt-shaped copper foil, an active material film formed such that powder including a negative-electrode active material is moisturized and granulated into granulated bodies and the granulated bodies are formed into a film shape; applying a pasty heat resistant layer on the active material film; and drying the active material film and the heat resistant layer. In the applying, an HRL paste including a binder is applied as the heat resistant layer. The drying includes a first drying step, and second and third drying steps subsequent to the first drying step. A preset temperature of a first furnace used in the first drying step is a first temperature, and preset temperatures of a second furnace used in the second drying step and a third furnace used in the third drying step are a second temperature lower than the first temperature.