Nonaqueous electrolytic solution and lithium secondary battery
A nonaqueous electrolytic solution is a nonaqueous electrolytic solution for a lithium secondary battery, the lithium secondary battery including a positive electrode that includes a positive electrode active material, and a negative electrode that includes a negative electrode active material which is a carbonaceous material storing and releasing a lithium ion. The nonaqueous electrolytic solution includes: one or more anions selected from an oxalato borate anion and an oxalato phosphate anion; and one or more arylamine compounds. The nonaqueous electrolytic solution is present between the positive electrode and the negative electrode and conducts a lithium ion.
1. A nonaqueous electrolytic solution for a lithium secondary battery, the lithium secondary battery including a positive electrode that includes a positive electrode active material, and a negative electrode that includes a negative electrode active material that is a carbonaceous material storing and releasing a lithium ion, the nonaqueous electrolytic solution comprising:
one or more anions selected from anions represented by following Formulae (1) or (3) to (5),
at least one arylamine compound selected from the group consisting of 1,8-bis(dimethylamino)naphthalene and 5-dimethylaminonaphthalene-1-sulfonyl fluoride;
at least one lithium salt selected from the group consisting of LiPF 6 , LiBF 4 , LiAsF 6 , LiCF 3 SO 3 , LiN(CF 3 SO 2 ) 2 , LiC(CF 3 SO 2 ) 3 , LiSbF 6 , LiSiF 6 , LiAlF 4 , LiSCN, LiClO 4 , LiCl, LiF, LiBr, LiI, and LiAlCl 4 , and
an organic solvent, wherein:
the nonaqueous electrolytic solution is present between the positive electrode and the negative electrode and conducts the lithium ion; and
a content of the at least one aryl amine compound is 0.01 mass % to 10 mass % with respect to a total mass of the nonaqueous electrolytic solution;
2. The nonaqueous electrolytic solution according to claim 1 , wherein the anions are BFO represented by Formula (1).
3. The nonaqueous electrolytic solution according to claim 1 , wherein a content of the anions is 0.1 mol/L, to a saturated concentration with respect to the organic solvent.
4. A lithium secondary battery comprising:
a positive electrode including a positive electrode active material;
a negative electrode including a negative electrode active material that is a carbonaceous material storing and releasing the lithium ion; and
the nonaqueous electrolytic solution according to claim 1 is present between the positive electrode and the negative electrode and the nonaqueous electrolytic solution conducts a lithium ion.