Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery comprising a negative electrode, an electrolytic solution, and a positive electrode, wherein

• regarding an intensity of a peak derived from the organic solvent in a vibrational spectroscopy spectrum of the electrolytic solution, Is>Io is satisfied when an intensity of an original peak of the organic solvent is represented as Io and an intensity of a peak resulting from shifting of the original peak is represented as Is, or
• d/c obtained by dividing a density d (g/cm3) of the electrolytic solution by a salt concentration c (mol/L) of the electrolytic solution is within a range of 0.15≦d/c≦0.71, and the following condition 1 and/or condition 2 are/is satisfied.
• Condition 1:
• The electrolytic solution contains:
• a salt whose cation is an alkali metal, an alkaline earth metal, or aluminum and whose anion includes a sulfur element and an oxygen element in a chemical structure thereof;
• and an organic solvent having a heteroelement, and
• a S,O-containing coating having a S═O structure is formed on a surface/surfaces of the negative electrode and/or the positive electrode.
• Condition 2:
• The electrolytic solution contains a salt whose cation is an alkali metal, an alkaline earth metal, or aluminum, and an organic solvent having a heteroelement, and
• the negative electrode includes a binding agent formed of a polymer having a hydrophilic group.