ELECTROLYTIC SOLUTION FOR LITHIUM-ION SECONDARY BATTERY, LITHIUM-ION SECONDARY BATTERY, AND MODULE

An electrolyte solution for a lithium ion secondary battery, including a compound (1) represented by the following formula (1): wherein Rand Rare each independently a methyl, ethyl, propyl, or butyl group. Also disclosed is a lithium ion secondary battery including the electrolyte solution and a module including the lithium ion secondary battery.