Secondary battery, battery pack, electric vehicle, electric power storage system, electric power tool, and electronic apparatus

1. A secondary battery, comprising:

a cathode;

an anode; and

an electrolytic solution including a cyano compound represented by the following formula (1),

the cathode, the anode, and the electrolytic solution being provided inside a film-like outer package member,

where X1 n1+ is one of a metal ion and an onium ion, M1 is one of transition metal elements, and Group 13 elements, Group 14 elements, and Group 15 elements in the long form of the periodic table of the elements, Rf is one of a fluorine group and a monovalent fluorinated hydrocarbon group, Y1 is one of —C(═O)—(CR1 2 ) d1 -C(═O)—, —CR2 2 -(CR3 2 ) e1 -C(═O)—, —S(═O) 2 —(CR3 2 ) e1 -S(═O) 2 —, —CR2 2 -(CR3 2 ) e1 -S(═O) 2 —, —C(═O)—(CR3 2 ) e1 -S(═O) 2 —, and —CR2 2 -(CR3 2 ) e1 -CR2 2 -, R1 is one of a fluorine group (—F), a monovalent hydrocarbon group, or a monovalent fluorinated hydrocarbon group, each of R2 and R3 is one of a hydrogen group (—H), a fluorine group (—F), a monovalent hydrocarbon group, and a monovalent fluorinated hydrocarbon group, each of a1, f1, and n1 is an integer of 1 or 2, b1 is an integer of 1 to 4, c1 is an integer of 0 to 3, each of d1 and e1 is an integer of 0 to 4, and each of g1 and m1 is an integer of 1 to 3.

2. The secondary battery according to claim 1 , wherein the X1 is one of Group 1 elements and Group 2 elements in the long form of the periodic table of the elements.

3. The secondary battery according to claim 1 , wherein the X1 is lithium (Li).

4. The secondary battery according to claim 1 , wherein the M1 is one of boron (B), phosphorus (P), and aluminum (Al).

5. The secondary battery according to claim 1 , wherein

the monovalent hydrocarbon group is one of an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aryl group, and a monovalent group in which two or more of the alkyl group, the alkenyl group, the alkynyl group, the cycloalkyl group, and the aryl group are bound, and

the monovalent fluorinated hydrocarbon group is a group in which one or more hydrogen groups in the monovalent hydrocarbon group are substituted by a fluorine group.

6. The secondary battery according to claim 1 , wherein

the Rf is the monovalent fluorinated hydrocarbon group, and

the number of carbons in the monovalent fluorinated hydrocarbon group is from 1 to 10.

7. The secondary battery according to claim 1 , wherein a content of the cyano compound in the electrolytic solution is from 0.01 mol/kg to 0.5 mol/kg both inclusive.

8. The secondary battery according to claim 1 , wherein

the electrolytic solution includes one or more of unsaturated cyclic carbonate esters represented by the following formulas (2), (3), and (4),

where each of R11 and R12 is one of a hydrogen group and an alkyl group, each of R13 to R16 is one of a hydrogen group, an alkyl group, a vinyl group, and an allyl group, one or more of R13 to R16 is one of the vinyl group and the allyl group, R17 is a group represented by >CR171R172, and each of R171 and R172 is one of a hydrogen group and an alkyl group.

9. The secondary battery according to claim 1 , wherein the electrolytic solution includes one or more of halogenated carbonate esters represented by the following formulas (5) and (6),

where each of R18 to R21 is one of a hydrogen group, a halogen group, an alkyl group, and a halogenated alkyl group, one or more of R18 to R21 is one of the halogen group and the halogenated alkyl group, each of R22 to R27 is one of a hydrogen group, a halogen group, an alkyl group, and a halogenated alkyl group, and one or more of R22 to R27 is one of the halogen group and the halogenated alkyl group.

10. The secondary battery according to claim 1 , wherein the secondary battery is a lithium-ion secondary battery.

11. A battery pack, comprising:

the secondary battery according to claim 1 ;

a controller that controls an operation of the secondary battery; and

a switch section that switches the operation of the secondary battery in accordance with an instruction from the controller.

12. An electric vehicle, comprising:

the secondary battery according to claim 1 ;

a converter that converts electric power supplied from the secondary battery into drive power;

a drive section that operates in accordance with the drive power; and

a controller that controls an operation of the secondary battery.

13. An electric power storage system, comprising:

the secondary battery according to claim 1 ;

one or more electric devices that are supplied with electric power from the secondary battery; and

a controller that controls the supplying of the electric power from the secondary battery to the one or more electric devices.

14. An electric power tool, comprising:

the secondary battery according to claim 1 ; and

a movable section that is supplied with electric power from the secondary battery.

15. An electronic apparatus comprising the secondary battery according to claim 1 as an electric power supply source.