ELECTROLYTIC SOLUTION FOR NONAQUEOUS SECONDARY BATTERIES, AND NONAQUEOUS SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide an electrolytic solution for nonaqueous secondary batteries and a nonaqueous secondary battery which make possible to achieve a high overcharge protection performance and to suppress the degradation thereof.SOLUTION: An electrolytic solution for nonaqueous secondary batteries comprises: an electrolyte; an organic solvent; and a particular additive agent having a structure expressed by the functional group (A) below. In the electrolytic solution, a primary chain carbonate compound accounts for 20-95 vol.% of the organic solvent; and 0.5-10 mass% of the particular additive agent is included in the whole electrolytic solution. (Rto Rare independently a hydrogen atom, a halogen atom or a carbon hydride group; at least two of Rto Rare carbon hydride groups respectively; the carbon hydride groups can each have a group including at least one atom selected from an oxygen atom, a nitrogen atom, a sulfur atom, and a halogen atom; and "*" represents a binding bond.)