| abstract |
[PROBLEMS] To obtain a lithium secondary battery having excellent characteristics such as energy density and electromotive force, and having excellent cycle life and safety. As an electrolytic solution, an aprotic solvent contains an imide anion, a transition metal ion and a compound having a sulfonyl group, or a lithium salt is dissolved in an aprotic solvent, and at least an imide anion and a transition metal ion An electrolytic solution containing a metal complex composed of a compound having a sulfonyl group is used. [Selection] Figure 1 |