Electrolytic solution for secondary battery, secondary battery, battery pack, electrically driven vehicle, power storage system, electrically driven tool, and electronic device
A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution including at least one of sulfonyl compounds expressed by R(—S(═O) 2 —Rf) n , where R represents an n-valent hydrocarbon group including one or two or more aliphatic hydrocarbon rings, Rf includes one of a halogen group and a monovalent halogenated hydrocarbon group, n is an integer greater than or equal to 1.
1. A secondary battery, comprising:
a positive electrode;
a negative electrode; and
an electrolytic solution including at least one of sulfonyl compounds expressed by chemical formula (1):
wherein R represents an n-valent hydrocarbon group including one or two or more aliphatic hydrocarbon rings, Rf includes one of a halogen group and a monovalent halogenated hydrocarbon group, n is an integer greater than or equal to 1,
wherein the n-valent hydrocarbon group further includes one or two or more aromatic hydrocarbon rings, and
wherein a ring closest to a sulfur atom forming a sulfonyl group is not an aromatic hydrocarbon ring but is an aliphatic hydrocarbon ring.
2. The secondary battery according to claim 1 , wherein, in the chemical formula (1), the sulfur atom is bonded to a carbon atom, and the carbon atom forms the aliphatic hydrocarbon ring.
3. The secondary battery according to claim 1 , wherein
the n-valent hydrocarbon group is at least one selected from:
a n-valent group including one monocyclic aliphatic hydrocarbon ring;
a n-valent group including one polycyclic aliphatic hydrocarbon ring;
a n-valent group in which two or more monocyclic aliphatic hydrocarbon rings are bonded to each other;
a n-valent group in which two or more polycyclic aliphatic hydrocarbon rings are bonded to each other;
a n-valent group in which one or more monocyclic aliphatic hydrocarbon rings and one or more polycyclic aliphatic hydrocarbon rings are bonded to each other;
a n-valent group in which one or more monocyclic aliphatic hydrocarbon rings and one or more aliphatic hydrocarbon chains are bonded to each other;
a n-valent group in which one or more polycyclic aliphatic hydrocarbon rings and one or more aliphatic hydrocarbon chains are bonded to each other; and
a n-valent group in which one or more monocyclic aliphatic hydrocarbon rings, one or more polycyclic aliphatic hydrocarbon rings, and one or more aliphatic hydrocarbon chains are bonded to one another, and
wherein the aliphatic hydrocarbon chains are at least one of alkyl chains, alkenyl chains, and alkynyl chains.
4. The secondary battery according to claim 3 , wherein
the n-valent hydrocarbon group includes an n-valent group including one monocyclic aliphatic hydrocarbon ring, and
the one monocyclic aliphatic hydrocarbon ring includes 3 or more and 12 or less carbons.
5. The secondary battery according to claim 1 , wherein
the halogen group includes at least one of a fluorine group (—F), a chlorine group (—Cl), a bromine group (—Br), and an iodine group (—I), and
the monovalent halogenated hydrocarbon group includes a group obtained by substituting at least one hydrogen group (—H) with the halogen group in an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aryl group, and monovalent groups in which two or more different groups are bonded to each other.
6. The secondary battery according to claim 1 , wherein
the monovalent halogenated hydrocarbon group includes a group obtained by substituting at least one hydrogen group with the halogen group in an alkyl group, and
the one monovalent halogenated hydrocarbon group includes 1 or more and 4 or less carbons.
7. The secondary battery according to claim 1 , wherein the monovalent halogenated hydrocarbon group includes a perfluoroalkyl group.
8. The secondary battery according to claim 1 , wherein the n is smaller than or equal to 4.
9. The secondary battery according to claim 1 , wherein the electrolytic solution further includes a compound expressed by chemical formula (3):
wherein R2 represents a bivalent hydrocarbon group including one or two or more aliphatic hydrocarbon rings, Rf2 and Rf3 each include one of a halogen group and a monovalent halogenated hydrocarbon group.
10. The secondary battery according to claim 1 , wherein a content of the at least one of the sulfonyl compounds in the electrolytic solution is from 0.01 wt % to 5 wt %.
11. The secondary battery according to claim 1 , wherein the secondary battery includes a lithium ion secondary battery.
12. The secondary battery according to claim 1 , wherein the one or two or more aliphatic rings are closest to a sulfur atom forming a sulfonyl group.
13. An electrolytic solution for secondary battery, comprising at least one of sulfonyl compounds expressed by chemical formula (1):
wherein R represents an n-valent hydrocarbon group including one or two or more aliphatic hydrocarbon rings, Rf includes one of a halogen group and a monovalent halogenated hydrocarbon group, n is an integer greater than or equal to 1,
wherein the n-valent hydrocarbon group further includes one or two or more aromatic hydrocarbon rings, and
wherein a ring closest to a sulfur atom forming a sulfonyl group is not an aromatic hydrocarbon ring but is an aliphatic hydrocarbon ring.
14. A battery pack, comprising:
a secondary battery;
a controller configured to control an operation of the secondary battery; and
a switch configured to change the operation of the secondary battery,
the secondary battery comprising:
a positive electrode;
a negative electrode; and
an electrolytic solution including at least one of sulfonyl compounds expressed by chemical formula (1):
wherein R represents an n-valent hydrocarbon group including one or two or more aliphatic hydrocarbon rings, Rf includes one of a halogen group and a monovalent halogenated hydrocarbon group, n is an integer greater than or equal to 1,
wherein the n-valent hydrocarbon group further includes one or two or more aromatic hydrocarbon rings, and
wherein a ring closest to a sulfur atom forming a sulfonyl group is not an aromatic hydrocarbon ring but is an aliphatic hydrocarbon ring.
15. An electrically driven vehicle, comprising:
the secondary battery according to claim 1 ;
a converter configured to convert electric power supplied from the secondary battery into a driving force;
a driver driven in accordance with the driving force; and
a controller configured to control an operation of the secondary battery.
16. A power storage system, comprising:
the secondary battery according to claim 1 ;
one or two or more electric devices configured to receive electric power from the secondary battery; and
a controller configured to control power supply operation from the secondary battery to the electric devices.
17. An electrically driven tool, comprising:
the secondary battery according to claim 1 ; and
a movable part configured to receive electric power from the secondary battery.
18. An electronic device, comprising the secondary battery according to claim 1 as a power supply.