ADDITIVE FOR NON-AQUEOUS ELECTROLYTIC SOLUTIONS, NON-AQUEOUS ELECTROLYTIC SOLUTION, AND ELECTRICAL STORAGE DEVICE

Disclosed is an additive for nonaqueous electrolyte solutions, including a first compound represented by the formula (1), and at least one second compound selected from the group consisting of an ethylene carbonate compound, a vinyl ethylene carbonate compound, a cyclic sulfonic acid ester compound, and a cyclic disulfonic acid ester compound,