SECONDARY BATTERY

A secondary battery includes: a positive electrode current collector; a negative electrode current collector; a positive electrode electrolytic solution part provided so as to be in contact with the positive electrode current collector, the positive electrode electrolytic solution part containing a positive electrode electrolytic solution; and a negative electrode electrolytic solution part provided so as to be in contact with the negative electrode current collector, the negative electrode electrolytic solution part containing a negative electrode electrolytic solution. The positive electrode electrolytic solution contains a positive electrode active material, an electrolyte salt and a non-aqueous solvent containing a first solvent. The negative electrode electrolytic solution contains a negative electrode active material, an electrolyte salt and a non-aqueous solvent containing a second solvent. The second solvent is a solvent having a reduction potential that is lower than an eigenvalue depending on the negative electrode active material.