Nonaqueous electrolytic solution and nonaqueous electrolytic solution secondary battery using same
View Patent ↗The present invention relates to a nonaqueous electrolytic solution for use in a nonaqueous electrolytic solution secondary battery that comprises a negative electrode and a positive electrode capable of storing and releasing metal ions, and a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains the specific compounds (A) and (B).
1. A nonaqueous electrolytic solution secondary battery, comprising:
a positive electrode capable of storing and releasing metal ions;
a negative electrode consisting essentially of a carbonaceous material, a thickener, and a binder; and
a nonaqueous electrolytic solution,
wherein the nonaqueous electrolytic solution comprises a compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond, and a carbonate ester having a halogen atom.
2. The secondary battery according to claim 1 , wherein the carbonate ester having a halogen atom is at least one compound selected from monofluoroethylene carbonate, 4,4-difluoroethylene carbonate, and 4,5-difluoroethylene carbonate.
3. The secondary battery according to claim 1 , wherein the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond is a compound of formula (4):
wherein A 1 to A 6 may be the same or different, and represent a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 10 carbon atoms that may have a heteroatom, or an optionally substituted hydrogen silicide group of 1 to 10 silicon atoms, and
wherein A 1 to A 6 may bind to one another to form a ring, where none of A 1 to A 6 is an aliphatic substituent having an unsaturated bond.
4. The secondary battery according to claim 1 , wherein the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond is at least one selected from the group consisting of hexamethyldisilane, hexaethyldisilane, 1,2-diphenyltetramethyldisilane, and 1,1,2,2-tetraphenyldisilane.
5. The secondary battery according to claim 1 , which comprises the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond in an amount of 0.01 mass % or more and 10 mass % or less.
6. The secondary battery according to claim 1 , wherein the carbonaceous material is graphite.
7. The secondary battery according to claim 1 , wherein the binder is present in the carbonaceous material in an amount of 0.1 to 20% by mass.
8. The secondary battery according to claim 1 , wherein the thickener is present in the carbonaceous material in an amount of 0.1 to 5% by mass.
9. The secondary battery according to claim 1 , wherein the carbonaceous material is graphite, the binder is present in the carbonaceous material in an amount of 0.1 to 20% by mass, and the thickener is present in the carbonaceous material in an amount of 0.1 to 5% by mass.
10. The secondary battery according to claim 1 , wherein the negative electrode consists of a carbonaceous material, a thickener, and a binder.
11. The secondary battery according to claim 1 , wherein
the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond is at least one selected from the group consisting of hexamethyldisilane and 1,2-diphenyltetramethyldisilane, and
the carbonate ester having a halogen atom is monofluoroethylene carbonate.