SECONDARY BATTERY AND MANUFACTURING METHOD OF THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a secondary battery capable of improving cycle characteristics of the secondary battery without exposing an electrode to a high temperature in a manufacturing process and a manufacturing method of the same.SOLUTION: The secondary battery includes a negative electrode having a negative electrode foil 42a and a negative electrode mixture layer 42b. The negative electrode mixture layer 42b contains SiO-based active material particles 1 and a binder 2. Each of the SiO-based active material particles 1 is at least partially covered by a coating layer 3 composed of a resin material containing an imide bond imidized at a temperature higher than a heat-resistant temperature of the binder 2.