NONAQUEOUS ELECTROLYTE SOLUTION, METHOD FOR PRODUCING SAME, AND NONAQUEOUS ELECTROLYTE BATTERY USING THE ELECTROLYTE SOLUTION

摘要

[Problem] To provide: a novel nonaqueous electrolyte solution which uses a methylene bissulfonate derivative, reduces the initial irreversible capacity of a battery, and improves battery characteristics such as cycle characteristics, electric capacity and storage characteristics; a method for producing the nonaqueous electrolyte solution; and a battery which uses the electrolyte solution. [Solution] The present invention relates to the following <1>-<3>. <1> A nonaqueous electrolyte solution which contains the following (1)-(3). (1) A nonaqueous solvent which contains at least one ester selected from among cyclic carbonate esters, chain carbonate esters and cyclic carboxylic acid esters. (2) A lithium salt which can be dissolved as an electrolyte salt into the nonaqueous solvent. (3) A methylene bissulfonate derivative which is represented by general formula [I]. <2> A method for producing a nonaqueous electrolyte solution, which is characterized in that a lithium salt is dissolved in a nonaqueous solvent and then the methylene bissulfonate derivative is dissolved in the nonaqueous solvent. <3> A nonaqueous electrolyte battery which comprises (i) the nonaqueous electrolyte solution set forth in <1>, (ii) a negative electrode, (iii) a positive electrode and (iv) a separator.