| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery which enables both of the increase in safety and reversible charge and discharge reactions.SOLUTION: A nonaqueous secondary battery comprises: a positive electrode; and an electrolytic solution. The positive electrode includes a positive electrode active material having a lithium metal complex oxide having a spinel structure. The electrolytic solution includes: a lithium salt which makes an alkali metal, an alkali-earth metal or aluminum a cation; and an organic solvent having a hetero element. As to peak intensities originating from the organic solvent in vibrational spectra of the electrolytic solution, Is>Io holds, where Io represents a peak intensity of the organic solvent per se, and Is represents a peak intensity resulting from the shift of the peak.SELECTED DRAWING: Figure 1 |
