ELECTROLYTIC SOLUTION, ELECTROCHEMICAL DEVICE, LITHIUM-ION SECONDARY BATTERY, AND MODULE

The disclosure aims to provide an electrolyte solution capable of reducing the initial resistance of an electrochemical device, and an electrochemical device including the electrolyte solution. The electrolyte solution contains at least one compound (1) selected from the group consisting of a compound represented by the following formula (1-1) and a compound represented by the following formula (1-2), the formula (1-1) being wherein R to R are each individually a C1-C4 linear alkyl group, the formula (1-2) being wherein R to R are each individually a C1-C4 linear alkyl group.