Manufacturing method of non-aqueous electrolytic solution secondary battery, slurry for non-aqueous electrolytic solution secondary battery, and non-aqueous electrolytic solution secondary battery

A manufacturing method of a non-aqueous electrolytic solution secondary battery, comprising the following (a1) to (c1), or the following (a2) to (c2):

• (a1) obtaining a positive electrode layer member consisting of a laminate of a positive electrode collector and a positive electrode slurry layer obtained by dispersing a positive electrode active material in a non-aqueous electrolytic solution in which at least a part of solvents has a relative permittivity of 5.0 or more and a viscosity of less than 2.0 mPa·s;
• (b1) forming a laminated structure of a negative electrode collector and a slurry layer for a negative electrode, which is obtained by dispersing a negative electrode active material in a non-aqueous electrolytic solution in which a solvent has a relative permittivity of less than 5.0 and/or a viscosity of 2.0 mPa·s or more, and obtaining a negative electrode layer member consisting of a laminate of the negative electrode collector and a negative electrode slurry layer by adding, to the slurry layer for a negative electrode, a solvent having a relative permittivity of 5.0 or more and a viscosity of less than 2.0 mPa·s;
• and
• (c1) laminating the positive electrode layer member, a separator, and the negative electrode layer member to form a laminated structure in which one side of the separator and the positive electrode slurry layer are in contact with each other and the other side of the separator and the negative electrode slurry layer are in contact with each other;
• (a2) obtaining a positive electrode layer member consisting of a laminate of a positive electrode collector and a positive electrode slurry layer obtained by dispersing a positive electrode active material in a non-aqueous electrolytic solution in which a proportion of a solvent having a relative permittivity of 5.0 or more and a viscosity of less than 2.0 mPa·s with respect to solvents is X % by mass;
• (b2) obtaining a negative electrode layer member consisting of a laminate of a negative electrode collector and a negative electrode slurry layer obtained by dispersing a negative electrode active material in a non-aqueous electrolytic solution in which a proportion of a solvent having a relative permittivity of 5.0 or more and a viscosity of less than 2.0 mPa·s with respect to solvents is lower than X % by mass;
• and
• (c2) laminating the positive electrode layer member, a separator, and the negative electrode layer member to form a laminated structure in which one side of the separator and the positive electrode slurry layer are in contact with each other and the other side of the separator and the negative electrode slurry layer are in contact with each other.