ELECTROLYTE AND SECONDARY BATTERY

摘要

Provided is an electrolyte in which the process temperature of an aluminum precipitation/dissolution reaction can be reduced. Also provided is a secondary battery in which the electrolyte is used. The electrolyte comprises an aluminum salt, an alkylsulphone (R1-S(=O)2-R2, where R1 and R2 each represent an alkyl group), and a solvent (relative permittivity: 20 or less). The content of the solvent is from 30 mol% to less than 88 mol%, and the molar ratio (content of aluminum salt/content of alkylsulphone) is from 4/5 to less than 7/3.