Nonaqueous electrolyte solution, nonaqueous electrolyte secondary battery, and method of producing nonaqueous electrolyte secondary battery

A nonaqueous electrolyte solution used for a nonaqueous electrolyte secondary battery, the nonaqueous electrolyte solution comprising:

• a nonaqueous solvent comprising a cyclic carbonate,
• a fluorinated carboxylate ester represented by the following formula A,
• a compound represented by the following formula C, and
• a compound represented by the following formula D;
• wherein a volume ratio between the fluorinated carboxylate ester and the cyclic carbonate is 70:30 to 95:5;
• wherein, in formula C, R4 is an alkylene group including two to eight carbon atoms or a substituted alkylene group including two to eight carbon atoms, and the substituent of the substituted alkylene group is selected from the group consisting of a halogen group, a nitro group, an isocyanate group, a cyanate group, an ester group, a ketone group, an alkyl ether group, and a cyano group;
• wherein, in formula D, each of R5 and R6 is independently selected from the group consisting of a hydrogen atom, a fluorine atom, an alkyl group, an alkyl group including fluorine atoms and an aryl group or R5 and R6 are bonded to each other to form an aromatic ring or an aliphatic ring;
• wherein, in formula A, —R1 is selected from the group consisting of —CH3, —CH2CH3, —CF2H, —CFH2, —CF3, —CH2CF3, —CH2CF2H, —CH2CFH2, —CFHCF3, —CFHCF2H, —CFHCFH2, —CF2CF3, —CF2CF2H, and —CF2CFH2, and —X is selected from the group consisting of —H, —CF2H, —CFH2, and —CH3;
• wherein a content ratio of a mass of the compound D with respect to a mass of the compound C (compound D/compound C) is 0.5 or more and 2 or less;
• and
• wherein a content of the compound represented by the formula C is 0.005 mass % or more and 10 mass % or less with respect to a total mass of the nonaqueous electrolyte solution;
• and a content of the compound represented by the formula D is 0.005 mass % or more and 10 mass % or less with respect to the total mass of the nonaqueous electrolyte solution.