Electrolytic solution, secondary battery, battery pack, electric vehicle, electric power storage system, electric power tool, and electronic apparatus

An electrolytic solution, comprising:

• a cyano compound including a compound represented by a following Formula (1),
• where R3 is one of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an oxygen-containing saturated hydrocarbon group, halogenated groups of the foregoing groups, and groups each obtained by bonding two or more of the foregoing groups to one another,
• R4 is one of a cyano-group-containing group, halogenated groups thereof, and groups each obtained by bonding two or more of the foregoing groups to one another,
• a cyano group in the cyano-group-containing group is bonded to an oxygen atom at a terminal of a —C(═O)—O— bond with one or more carbon atoms in between,
• when the R3 includes an unsaturated carbon bond, number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 includes the unsaturated carbon bond, the number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 does not include the unsaturated carbon bond, the number of the cyano group in the R4 is two or larger than two, and
• the compound represented by the Formula (1) is one or more of compounds represented by following Formula (1-1) to Formula (1-17)

A battery pack, comprising:

• a secondary battery;
• a control section controlling a used state of the secondary battery;
• and
• a switch section switching the used state of the secondary battery according to an instruction of the control section, wherein
• the secondary battery includes
• a cathode,
• an anode, and
• an electrolytic solution including a cyano compound,
• wherein the cyano compound includes a compound represented by a following Formula (1),
• where R3 is one of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an oxygen-containing saturated hydrocarbon group, halogenated groups of the foregoing groups, and groups each obtained by bonding two or more of the foregoing groups to one another,
• R4 is one of a cyano-group-containing group, halogenated groups thereof, and groups each obtained by bonding two or more of the foregoing groups to one another,
• a cyano group in the cyano-group-containing group is bonded to an oxygen atom at a terminal of a —C(═O)—O— bond with one or more carbon atoms in between,
• when the R3 includes an unsaturated carbon bond, number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 includes the unsaturated carbon bond, the number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 does not include the unsaturated carbon bond, the number of the cyano group in the R4 is two or larger than two, and
• the compound represented by the Formula (1) is one or more of compounds represented by following Formula (1-1) to Formula (1-17)

An electric vehicle, comprising:

• a secondary battery;
• a conversion section converting electric power supplied from the secondary battery into drive power;
• a drive section operating according to the drive power;
• and
• a control section controlling a used state of the secondary battery, wherein the secondary battery includes
• a cathode,
• an anode, and
• an electrolytic solution including a cyano compound, wherein the cyano compound includes a compound represented by a following Formula (1),
• where R3 is one of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an oxygen-containing saturated hydrocarbon group, halogenated groups of the foregoing groups, and groups each obtained by bonding two or more of the foregoing groups to one another,
• R4 is one of a cyano-group-containing group, halogenated groups thereof, and groups each obtained by bonding two or more of the foregoing groups to one another,
• a cyano group in the cyano-group-containing group is bonded to an oxygen atom at a terminal of a —C(═O)—O— bond with one or more carbon atoms in between,
• when the R3 includes an unsaturated carbon bond, number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 includes the unsaturated carbon bond, the number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 does not include the unsaturated carbon bond, the number of the cyano group in the R4 is two or larger than two, and
• the compound represented by the Formula (1) is one or more of compounds represented by following Formula (1-1) to Formula (1-17)

An electric power storage system, comprising:

• a secondary battery;
• one or more electric devices supplied with electric power from the secondary battery;
• and
• a control section controlling the supplying of the electric power from the secondary battery to the one or more electric devices, wherein
• the secondary battery includes
• a cathode,
• an anode, and
• an electrolytic solution including a cyano compound,
• wherein the cyano compound includes a compound represented by a following Formula (1),
• where R3 is one of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an oxygen-containing saturated hydrocarbon group, halogenated groups of the foregoing groups, and groups each obtained by bonding two or more of the foregoing groups to one another,
• R4 is one of a cyano-group-containing group, halogenated groups thereof, and groups each obtained by bonding two or more of the foregoing groups to one another,
• a cyano group in the cyano-group-containing group is bonded to an oxygen atom at a terminal of a —C(═O)—O— bond with one or more carbon atoms in between,
• when the R3 includes an unsaturated carbon bond, number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 includes the unsaturated carbon bond, the number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 does not include the unsaturated carbon bond, the number of the cyano group in the R4 is two or larger than two, and
• the compound represented by the Formula (1) is one or more of compounds represented by following Formula (1-1) to Formula (1-17)

An electric power tool, comprising:

• a secondary battery;
• and
• a movable section supplied with electric power from the secondary battery, wherein
• the secondary battery includes
• a cathode,
• an anode, and
• an electrolytic solution including a cyano compound,
• wherein the cyano compound includes a compound represented by a following Formula (1),
• where R3 is one of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an oxygen-containing saturated hydrocarbon group, halogenated groups of the foregoing groups, and groups each obtained by bonding two or more of the foregoing groups to one another,
• R4 is one of a cyano-group-containing group, halogenated groups thereof, and groups each obtained by bonding two or more of the foregoing groups to one another,
• a cyano group in the cyano-group-containing group is bonded to an oxygen atom at a terminal of a —C(═O)—O— bond with one or more carbon atoms in between,
• when the R3 includes an unsaturated carbon bond, number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 includes the unsaturated carbon bond, the number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 does not include the unsaturated carbon bond, the number of the cyano group in the R4 is two or larger than two, and
• the compound represented by the Formula (1) is one or more of compounds represented by following Formula (1-1) to Formula (1-17)

An electronic apparatus, comprising:

• a secondary battery as an electric power supply source,
• wherein the secondary battery includes
• a cathode,
• an anode, and
• an electrolytic solution including a cyano compound,
• wherein the cyano compound includes a compound represented by a following Formula (1),
• where R3 is one of a saturated hydrocarbon group, an unsaturated hydrocarbon group, an oxygen-containing saturated hydrocarbon group, halogenated groups of the foregoing groups, and groups each obtained by bonding two or more of the foregoing groups to one another,
• R4 is one of a cyano-group-containing group, halogenated groups thereof, and groups each obtained by bonding two or more of the foregoing groups to one another,
• a cyano group in the cyano-group-containing group is bonded to an oxygen atom at a terminal of a —C(═O)—O— bond with one or more carbon atoms in between,
• when the R3 includes an unsaturated carbon bond, number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 includes the unsaturated carbon bond, the number of the cyano group in the R4 is one or larger than one,
• when the R3 does not include the unsaturated carbon bond and the R4 does not include the unsaturated carbon bond, the number of the cyano group in the R4 is two or larger than two, and
• the compound represented by the Formula (1) is one or more of compounds represented by following Formula (1-1) to Formula (1-17)