| abstract |
The present invention provides the nonaqueous solvents comprising compound that a kind of conductibility is high and viscosity is low.A kind of high-performance electrical storage device using the nonaqueous solvents is also provided.A kind of electrical storage device including ionic liquid, the ionic liquid includes cation and anion comprising five yuan of hetero-aromatic rings with more than one substituent group, it is characterized in that, at least one of substituent group more than one of them is the straight chain of more than four atoms, and includes one of C, O, Si, N, S and P or a variety of. |