NONAQUEOUS ELECTROLYTE SOLUTION FOR SECONDARY BATTERY, AND SECONDARY BATTERY

To provide a non-aqueous electrolyte solution for secondary batteries which has excellent compatibility even in a state where a lithium salt is dissolved therein and further has excellent nonflammability and cycle properties, and a secondary battery having such a non-aqueous electrolyte solution for secondary batteries. A non-aqueous electrolyte solution for secondary batteries, which comprise a lithium salt, a specific hydrofluoromonoether and a specific hydrofluoropolyether, and a secondary battery containing such a non-aqueous electrolyte solution for secondary batteries.