Nonaqueous electrolytic solution and nonaqueous electrolyte secondary battery using the same
A nonaqueous electrolytic solution, containing an electrolyte, a nonaqueous solvent and an aromatic carboxylate ester of formula ( 1 ): wherein A 1 is an optionally substituted aryl group, n 1 is an integer of 1 or greater, R 2 and R 3 are a hydrogen atom, a halogen atom or an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, a 1 is an integer of 1 or 2, and when a 1 is 1, R 1 is an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, a 1 is 2, R 1 is an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, n 1 is 1, at least one of R 2 and R 3 is an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, and n 1 is 2 and R 2 s and R 3 s are all hydrogen atoms, R 1 is an optionally substituted aliphatic hydrocarbon group having 1 to 12 carbon atoms.
1. A nonaqueous electrolytic solution, comprising an electrolyte, a nonaqueous solvent and an aromatic carboxylate ester represented by foi mula (1):
wherein
A 1 is an optionally substituted aryl group,
n 1 is an integer of 1 or greater,
R 2 and R 3 are each independently a hydrogen atom, a halogen atom or an optionally substituted hydrocarbon group having 1 to 12 carbon atoms and may be bonded to each other to form a ring wherein when a plurality of R 2 s are present, R 2 s may be the same as or different from one another and when a plurality of R 3 s are present, R 3 s may be the same as or different from one another,
a 1 is an integer of 1 or 2,
when a 1 is 1, R 1 is an optionally substituted hydrocarbon group having 1 to 12 carbon atoms,
when a 1 is 2, R 1 is an optionally substituted hydrocarbon group having 1 to 12 carbon atoms and A 1 s may be the same as or different from each other,
when n 1 is 1, at least one of R 2 and R 3 is an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, and
when n 1 is 2 and R 2 s and R 3 s are all hydrogen atoms, R 1 is an optionally substituted aliphatic hydrocarbon group having 1 to 12 carbon atoms.
2. The nonaqueous electrolytic solution according to claim 1 , wherein a 1 in formula (1) is 1.
3. The nonaqueous electrolytic solution according to claim 1 , wherein A 1 in formula (1) is a phenyl group.
4. The nonaqueous electrolytic solution according to claim 1 , wherein the nonaqueous electrolytic solution contains the aromatic carboxylate ester represented by formula (1) in 0.001 mass % to 10 mass %.
5. The nonaqueous electrolytic solution according to claim 1 , wherein the nonaqueous electrolytic solution further comprises at least one compound selected from the group consisting of fluorine-containing cyclic carbonates, sulfur-containing organic compounds, phosphonate esters, cyano group-containing organic compounds, isocyanate group-containing organic compounds, silicon-containing compounds, aromatic compounds other than those of formula (1), cyclic carbonates having a carbon-carbon unsaturated bond, carboxylate esters other than those of formula (1), cyclic compounds having a plurality of ether bonds, monofluorophosphate salts, difluorophosphate salts, borate salts, oxalate salts and fluorosulfonate salts.
6. The nonaqueous electrolytic solution according to claim 1 , wherein the nonaqueous electrolytic solution comprises 0.001 mass % to 20 mass % of at least one compound selected from the group consisting of fluorine-containing cyclic carbonates, sulfur-containing organic compounds, phosphonate esters, cyano group-containing organic compounds, isocyanate group-containing organic compounds, silicon-containing compounds, aromatic compounds other than those of formula (1), cyclic carbonates having a carbon-carbon unsaturated bond, carboxy late esters other than those of formula (1), cyclic compounds having a plurality of ether bonds, monofluorophosphate salts, difluorophosphate salts, borate salts, oxalate salts and fluorosulfonate salts.
7. A nonaqueous electrolyte secondary battery, comprising:
a negative electrode and a positive electrode capable of storing and releasing lithium ions; and
a nonaqueous electrolytic solution comprising an electrolyte and a nonaqueous solvent, the nonaqueous electrolytic solution being the nonaqueous electrolytic solution according to claim 1 .