Electrolyte for secondary battery, secondary battery, battery pack, electric vehicle, electric power storage system, electric tool and electronic device

Patent metadata

Field	Value
Publication number	US-2020083564-A1
Application number	US-201916540749-A
Country	US
Kind code	A1
Filing date	Aug 14, 2019
Priority date	Feb 15, 2017
Publication date	Mar 12, 2020
Grant date	—

Abstract

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution containing a sulfonamide compound.

First claim

1 . A secondary battery comprising:
a positive electrode; a negative electrode; and an electrolytic solution containing a sulfonamide compound represented by Formula (1) below:

R1 represents either a divalent hydrocarbon group or a divalent halogenated hydrocarbon group. R2 represents any of a hydrogen group (—H), a monovalent hydrocarbon group, a monovalent nitrogen-containing hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, a monovalent sulfur-containing hydrocarbon group, a monovalent halogenated hydrocarbon group, and a monovalent group in which two or more kinds among these groups are bonded to each other. X represents any of an ether bond (—O—), a thio bond (—S—), and an amine bond (—NR3-), where R3 represents either of a hydrogen group or a monovalent hydrocarbon group. n represents either 0 or 1.

2 . The secondary battery according to claim 1 , wherein
the divalent hydrocarbon group is any of an alkylene group, an alkenylene group, an alkynylene group, a cycloalkylene group, an arylene group, and a divalent group in which two or more kinds among these groups are bonded to each other, the divalent halogenated hydrocarbon group is a group in which at least one hydrogen group in the divalent hydrocarbon group is substituted with a halogen group, the monovalent hydrocarbon group is any 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 among these groups are bonded to each other, the monovalent nitrogen-containing hydrocarbon group is any of a monovalent group in which the one monovalent hydrocarbon group and one or two or more monovalent nitrogen-containing groups are bonded to each other, a monovalent group in which one or two or more of the monovalent hydrocarbon groups and one or two or more of the amine bonds are bonded to each other, and a monovalent group in which two or more kinds among these groups are bonded to each other, the monovalent oxygen-containing hydrocarbon group is any of a monovalent group in which the one monovalent hydrocarbon group and one or two or more monovalent oxygen-containing groups are bonded to each other, a monovalent group in which one or two or more of the monovalent hydrocarbon groups and one or two or more of the ether bonds are bonded to each other, and a monovalent group in which two or more kinds among these groups are bonded to each other, the monovalent sulfur-containing hydrocarbon group is any of a monovalent group in which the one monovalent hydrocarbon group and one or two or more monovalent sulfur-containing groups are bonded to each other, a monovalent group in which one or two or more of the monovalent hydrocarbon groups and one or two or more of the thio bonds are bonded to each other, and a monovalent group in which two or more kinds among these groups are bonded to each other, and the monovalent halogenated hydrocarbon group is a group in which at least one hydrogen group in the monovalent hydrocarbon group is substituted with a halogen group, and the halogen group includes at least one kind among a fluorine group (—F), a chlorine group (—Cl), a bromine group (—Br), and an iodine group (—I).

3 . The secondary battery according to claim 2 , wherein
the monovalent nitrogen-containing group includes a cyano group (—CN), a nitro group (—NO 2 ), an amino group (—NH 2 ), an isocyanate group (—NCO), and an amide group (—CONH 2 —), the monovalent oxygen-containing group includes a hydroxyl group (—OH), an aldehyde group (—CHO), and a carboxyl group (—COOH), and the monovalent sulfur-containing group includes a sulfonic acid group (—SO 3 H) and a sulfonyl type group (—SO 2 R: R represents a monovalent hydrocarbon group).

4 . The secondary battery according to claim 1 , wherein
the divalent hydrocarbon group has 18 or less carbon atoms, and the monovalent hydrocarbon group has 18 or less carbon atoms.

5 . The secondary battery according to claim 1 , wherein a content of the sulfonamide compound in the electrolytic solution is 0.001% by weight or more and 10% by weight or less.

6 . The secondary battery according to claim 1 , wherein the electrolytic solution further contains an N-substituted sulfonamide compound represented by Formula (2) below:

R4 represents either a divalent hydrocarbon group or a divalent halogenated hydrocarbon group. R5 represents any of a hydrogen group, a monovalent hydrocarbon group, and a monovalent halogenated hydrocarbon group. Y represents any of an ether bond, a thio bond, and an amine bond (—NR6-), where R6 represents either of a hydrogen group or a monovalent hydrocarbon group. m represents either 0 or 1.

7 . The secondary battery according to claim 1 , wherein the electrolytic solution further contains at least one kind among unsaturated cyclic carbonate esters represented by respective Formulas (3), (4), and (5) below:

R11 and R12 each represent either a hydrogen group or an alkyl group. R13 to R16 each represent any of a hydrogen group, an alkyl group, a vinyl group, and an allyl group, and at least one of R13 to R16 represents either a vinyl group or an allyl group. R17 represents a group represented by ═CR171R172, where R171 and R172 each represents either a hydrogen group or an alkyl group.

8 . The secondary battery according to claim 1 , wherein the electrolytic solution further contains at least one among halogenated carbonate esters represented by respective Formulas (6) and (7) below:

R18 to R21 each represent any of a hydrogen group, a halogen group, an alkyl group, and a halogenated alkyl group, and at least one of R18 to R21 represents either a halogen group or a halogenated alkyl group. R22 to R27 each represent any of a hydrogen group, a halogen group, an alkyl group, and a halogenated alkyl group, and at least one of R22 to R27 represents either a halogen group or a halogenated alkyl group.

9 . The secondary battery according to claim 1 , wherein the electrolytic solution further contains a dinitrile compound represented by Formula (8) below:
NC—R28-CN  (8)
R28 represents either an alkylene group or an arylene group.

10 . The secondary battery according to claim 1 , wherein
the electrolytic solution further contains an electrolyte salt, and the electrolyte salt contains at least one kind among lithium tetrafluoroborate (LiBF 4 ), lithium difluorophosphate (LiPF 2 O 2 ), and lithium fluorophosphate (Li 2 PFO 3 ).

11 . The secondary battery according to claim 1 , which is a lithium ion secondary battery.

12 . An electrolytic solution for secondary battery comprising:
a sulfonamide compound represented by Formula (1) below:

R1 represents either a divalent hydrocarbon group or a divalent halogenated hydrocarbon group. R2 represents any of a hydrogen group, a monovalent hydrocarbon group, a monovalent nitrogen-containing hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, a monovalent sulfur-containing hydrocarbon group, a monovalent halogenated hydrocarbon group, and a monovalent group in which two or more kinds among these groups are bonded to each other. X represents any of an ether bo

Assignees

• Murata Manufacturing Co

Inventors

• Odani Toru
• Kawasumi Katsuaki
• Takeshi Kazumasa

Classifications

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M2300/0037

  Mixture of solvents · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2300/0051

  Carbonates · CPC title

• H01M10/0525 Primary

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