| abstract |
Provided is a solvent composition that exhibits non-volatile, non-combustible, thermal stability, chemical stability and high ionic conductivity, excellent high rate charge / discharge characteristics, no performance drop at low temperatures, and can function as a non-aqueous electrolyte in electrochemical devices. do. A solvent composition comprising an ionic liquid and a halogenated solvent having a degree of halogenation of 87% or less and comprising at least one partially halogenated alkyl group and / or at least one partially halogenated alkylene group, wherein the solvent composition is in a homogeneous state in a single phase at 25 ° C. do. |