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

Patent metadata

Field	Value
Publication number	US-9653752-B2
Application number	US-201213711317-A
Country	US
Kind code	B2
Filing date	Dec 11, 2012
Priority date	Dec 21, 2011
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A secondary battery includes: a cathode; an anode; and a gel electrolyte. The gel electrolyte includes an electrolytic solution and a polymer compound. The electrolytic solution includes an unsaturated cyclic ester carbonate represented by the following Formula (1),

where X is a divalent group in which m number of >C═CR1-R1 and n number of >CR3R4 are bonded in any order; each of R1 to R4 is one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; any two or more of the R1 to the R4 are allowed to be bonded to one another; and m and n satisfy m≧1 and n≧0.

First claim

The invention is claimed as follows:

1. A secondary battery comprising:
a cathode;
an anode; and
a gel electrolyte, wherein
the gel electrolyte includes an electrolytic solution and a polymer, and
the electrolytic solution includes 0.1 weight percent to 5 weight percent of an unsaturated cyclic ester carbonate represented by Formula (3),

where each of R7 to R10 is one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; and any two or more of the R7 to the R10 may be bonded to one another.

2. The secondary battery according to claim 1 , wherein
the halogen group is one of a fluorine group, a chlorine group, a bromine group, and an iodine group, and
the monovalent hydrocarbon group, the monovalent halogenated hydrocarbon group, the monovalent oxygen-containing hydrocarbon group, and the monovalent halogenated oxygen-containing hydrocarbon group include an alkyl group with carbon number from 1 to 12 both inclusive, an alkenyl group with carbon number from 2 to 12 both inclusive, an alkynyl group with carbon number from 2 to 12 both inclusive, an aryl group with carbon number from 6 to 18 both inclusive, a cycloalkyl group with carbon number from 3 to 18 both inclusive, an alkoxy group with carbon number from 1 to 12 both inclusive, a group obtained by bonding two or more thereof, and a group obtained by substituting each of part or all of hydrogen groups thereof by a halogen group.

3. The secondary battery according to claim 1 , wherein the unsaturated cyclic ester carbonate is represented by one of the following Formula (1-32) to Formula (1-56),

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

5. 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
a gel electrolyte,
the gel electrolyte includes an electrolytic solution and a polymer compound, and

the electrolytic solution includes 0.1 weight percent to 5 weight percent of an unsaturated cyclic ester carbonate represented by Formula (3),

where each of R7 to R10 is one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; and any two or more of the R7 to the R10 may be bonded to one another.

6. 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
a gel electrolyte,
the gel electrolyte includes an electrolytic solution and a polymer compound, and

the electrolytic solution includes 0.1 weight percent to 5 weight percent of an unsaturated cyclic ester carbonate represented by Formula (3),

where each of R7 to R10 is one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; and any two or more of the R7 to the R10 may be bonded to one another.

7. 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
a gel electrolyte,
the gel electrolyte includes an electrolytic solution and a polymer compound, and

the electrolytic solution includes 0.1 weight percent to 5 weight percent of an unsaturated cyclic ester carbonate represented by Formula (3),

where each of R7 to R10 is one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; and any two or more of the R7 to the R10 may be bonded to one another.

8. An electric power tool comprising:
a secondary battery; and
a movable section being supplied with electric power from the secondary battery, wherein
the secondary battery includes
a cathode,
an anode, and
a gel electrolyte,
the gel electrolyte includes an electrolytic solution and a polymer compound, and

the electrolytic solution includes 0.1 weight percent to 5 weight percent of an unsaturated cyclic ester carbonate represented by Formula (3),

where each of R7 to R10 is one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; and any two or more of the R7 to the R10 may be bonded to one another.

9. The secondary battery according to claim 1 , wherein the polymer is selected from the group consisting of polyvinylidene fluoride and a copolymer of vinylidene fluoride and hexafluoro propylene.

10. The secondary battery according to claim 9 , wherein the polymer is polyvinylidene fluoride.

11. The secondary battery according to claim 1 , wherein the electrolytic solution consists of the unsaturated cyclic ester carbonate and at least one of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate.

Assignees

• Sony Corp

Inventors

• Ihara Masayuki
• Kubota Tadahiko

Classifications

• H01M2300/0037

  Mixture of solvents · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0567

  characterised by the additives · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/623

  fluorinated polymers · CPC title