Non-aqueous electrolytic solution for lithium ion secondary cell

A non-aqueous electrolytic solution for a lithium ion secondary cell, comprising:

• a light metal salt represented by the following formula (I);
• and
• a silyl sulfate compound represented by the following formula (II), wherein
• a content of the light metal salt in the non-aqueous electrolytic solution for a lithium ion secondary cell is 0.1% by mass or more and 1.5% by mass or less, and
• a content of the silyl sulfate compound in the non-aqueous electrolytic solution for a lithium ion secondary cell is 0.1% by mass or more and 5.0% by mass or less,
• wherein R11 represents a —C(═O)—R—C(═O)— group (R represents an alkylene group, a halogenated alkylene group, an arylene group, or a halogenated arylene group), or a —C(═O)—C(═O)— group;
• R12 represents a halogen atom, an alkyl group, a halogenated alkyl group, an aryl group or a halogenated aryl group;
• X11 and X12 independently represent an oxygen atom or a sulfur atom;
• M11 represents a transition metal element or a Group 13 element, a Group 14 element or a Group 15 element in the periodic table;
• M12 represents a Group 1 element, a Group 2 element in the periodic table, or an aluminum element;
• a is an integer of 1 to 4;
• b is an integer of 0 to 8;
• c is an integer of 1 to 3;
• d is an integer of 1 to 3;
• e is an integer of 1 to 3;
• and f is an integer of 1 to 3, and
• wherein R21 to R26 each independently represent a C1-C4 alkyl group that may be substituted with a fluorine atom, a C2-C4 alkenyl group that may be substituted with a fluorine atom, a group in which an oxygen atom is inserted into a carbon-carbon bond of a C2-C4 alkyl group, or a group in which an oxygen atom is inserted into a carbon-carbon bond of a C3-C4 alkenyl group.