Method of producing electrode for secondary battery

A method of producing an electrode for a secondary battery having any electrode current collector of positive and negative electrodes and an electrode active material layer, the method comprising:

• a step in which a moisture powder formed of agglomerated particles containing at least an electrode active material, a binder resin, and a solvent is prepared,
• with a solid phase, a liquid phase, and a gas phase in at least 50 number % or more of the agglomerated particles forming a pendular state or a funicular state in the moisture powder;
• a step in which by using the moisture powder, a coating film composed of the moisture powder is formed on the electrode current collector, with a gas phase of the coating film being remained, and
• with an average film thickness t1 (μm) of the coating film being 50 μm or more;
• a step in which the coating film on the electrode current collector is transported, concavo-convex transfer is performed using a roll mold, and thus at least one groove extending in a transport direction is formed in a center of a surface part of the coating film,
• with the groove being formed to have a depth t2 (μm) satisfying ( 9/10×t1)>t2;
• and
• a step in which the coating film formed on the electrode current collector is dried to form an electrode active material layer.