Secondary battery negative electrode, secondary battery, and method for manufacturing secondary battery negative electrode

A method for producing a negative electrode for a secondary battery comprising:

• a first step of applying a negative electrode paste including a negative electrode active material containing a carbon material and a Si-based material, and a pore-foaming material to a negative electrode current collector, and then rolling the coating film;
• a second step of heat-treating the coating film after the first step, thereby decomposing and vaporizing the pore-forming material to form a negative electrode mixture layer,
• wherein the negative electrode mixture layer has a pore diameter distribution with two peak values R1 and R2 as measured by mercury porosimetry,
• the peak value R1 is greater than or equal to 0.5 μm and less than or equal to 1.5 μm, the peak value R2 is greater than or equal to 2 μm and less than or equal to 10 μm,
• the Si-based material has an average particle diameter of greater than or equal to 4 μm, and the Si-based material has a content of greater than or equal to 30 mass % of the total amount of the negative electrode active material.