NOVELTY - An nonaqueous electrolyte secondary battery (1) consists of a nonaqueous electrolyte containing a lithium-phosphate compound and a cyclic sulfone compound. The content of lithium-phosphate compound contained with respect to total content of the nonaqueous electrolyte is more than 0 %mass and 4 %mass or less. The content of cyclic sulfone compound contained with respect to total content of the nonaqueous electrolyte is more than 0 %mass and 3 %mass or less. The lithium-phosphate compound is difluoro(bis oxalate)lithium phosphate (I) or tetrafluoro(oxalate)lithium phosphate (II).    USE - Nonaqueous electrolyte secondary battery e.g. lithium-ion secondary battery for electric vehicle.    ADVANTAGE - The generation of gas due to initial charging/discharging of the nonaqueous electrolyte secondary battery and due to long-term use of the nonaqueous electrolyte secondary battery in a high temperature environment is suppressed.    DETAILED DESCRIPTION - An nonaqueous electrolyte secondary battery consists of a nonaqueous electrolyte containing a lithium-phosphate compound and a cyclic sulfone compound. The content of lithium-phosphate compound contained with respect to total content of the nonaqueous electrolyte is more than 0 %mass and 4 %mass or less. The content of cyclic sulfone compound contained with respect to total content of the nonaqueous electrolyte is more than 0 %mass and 3 %mass or less. The lithium-phosphate compound is difluoro(bis oxalate)lithium phosphate of formula (I) or tetrafluoro(oxalate)lithium phosphate of formula (II). An INDEPENDENT CLAIM is included for manufacture of nonaqueous electrolyte secondary battery, which involves using the nonaqueous electrolyte.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the nonaqueous electrolyte secondary battery.    Nonaqueous electrolyte secondary battery (1)    Positive electrode plate (3)    Negative electrode plate (4)    Separator (5)    Battery case (6)    Battery cover (7)