Electrolyte composition, solvent composition, non-aqueous electrolyte, and use thereof

Patent metadata

Field	Value
Publication number	US-12456753-B2
Application number	US-202017615477-A
Country	US
Kind code	B2
Filing date	Apr 28, 2020
Priority date	May 31, 2019
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

An electrolyte composition includes: a sulfonylimide compound represented by the following general formula (1) as an electrolyte salt; and an amidosulfuric acid component.

LiN(X 1 SO 2 )(X 2 SO 2 )  (1)
(where X 1 and X 2 are identical to or different from each other, and each represent a fluorine atom, an alkyl group with a carbon number of 1 to 6, or a fluoroalkyl group with a carbon number of 1 to 6).

First claim

The invention claimed is:

1 . An electrolyte composition comprising:
a sulfonylimide compound represented by general formula (1) as an electrolyte salt,
wherein the general formula (1) is LiN(X 1 SO 2 ) (X 2 SO 2 ), where X 1 and X 2 are identical to or different from each other, and each represent a fluorine atom, an alkyl group with a carbon number of 1 to 6, or a fluoroalkyl group with a carbon number of 1 to 6; and
an amidosulfuric acid component comprising at least one or more of amidosulfuric acid and a salt thereof, an amidosulfuric acid derivative and a salt thereof represented by general formula (4),
wherein the general formula (4) is R 1 R 2 NSO 2 (OM), where R 1 and R 2 each represent a hydrogen atom, an alkyl group with a carbon number of 1 to 10, a cycloalkyl group with a carbon number of 3 to 10, an aryl group with a carbon number of 6 to 16, an aralkyl group with a carbon number of 7 to 16, or an alkanoyl group with a carbon number of 2 to 16,
and where M represents a hydrogen atom or a metal atom, wherein a proportion of the amidosulfuric acid component relative to a total amount of the electrolyte salt and the amidosulfuric acid component is 0.1 ppm by mass or more to 10,000 ppm by mass or less.

2 . The electrolyte composition of claim 1 , wherein
the electrolyte salt further includes at least one compound selected from the group consisting of a compound represented by the following general formula (2), a compound represented by the following general formula (3), and lithium hexafluoroarsenate,
LiPF a (C m F 2m+1 ) 6-a (0≤ a≤ 6, 1≤ m≤ 4)  (2)

LiBF b (C n F 2n+1 ) 4-b (0≤ b≤ 4, 1≤ n≤ 4)  (3).

3 . The electrolyte composition of claim 1 , wherein
the amidosulfuric acid component includes at least one selected from amidosulfuric acid or an alkali metal salt of amidosulfuric acid.

4 . The electrolyte composition of claim 1 , having a fluoride ion at a concentration of 40 ppm by mass or less.

5 . The electrolyte composition of claim 1 , wherein the electrolyte composition consists of only the electrolyte salt and the amidosulfuric acid component.

6 . A battery comprising:
an electrolyte solution including the electrolyte composition of claim 1 .

7 . A solvent composition comprising:
a sulfonylimide compound represented by the following general formula (1) as an electrolyte salt; an amidosulfuric acid component; and a solvent,
LiN(X 1 SO 2 )(X 2 SO 2 )  (1),

 where X 1 and X 2 are identical to or different from each other, and each represent a fluorine atom, an alkyl group with a carbon number of 1 to 6, or a fluoroalkyl group with a carbon number of 1 to 6; and the amidosulfuric acid component comprises at least one or more of amidosulfuric acid and a salt thereof, an amidosulfuric acid derivative and a salt thereof represented by general formula (4),
wherein the general formula (4) is R 1 R 2 NSO 2 (OM), where R 1 and R 2 each represent a hydrogen atom, an alkyl group with a carbon number of 1 to 10, a cycloalkyl group with a carbon number of 3 to 10, an aryl group with a carbon number of 6 to 16, an aralkyl group with a carbon number of 7 to 16, or an alkanoyl group with a carbon number of 2 to 16, and where M represents a hydrogen atom or a metal atom,
wherein a proportion of the amidosulfuric acid component relative to a total amount of the electrolyte salt and the amidosulfuric acid component is 0.1 ppm by mass or more to 10,000 ppm by mass or less.

8 . The solvent composition of claim 7 , wherein
the electrolyte salt further includes at least one compound selected from the group consisting of a compound represented by the following general formula (2), a compound represented by the following general formula (3), and lithium hexafluoroarsenate,
LiPF a (C m F 2m+1 ) 6-a (0≤ a≤ 6, 1≤ m≤ 4)  (2)

LiBF b (C n F 2n+1 ) 4-b (0≤ b≤ 4, 1≤ n≤ 4)  (3).

9 . The solvent composition of claim 7 , wherein
the amidosulfuric acid component includes at least one selected from amidosulfuric acid or an alkali metal salt of amidosulfuric acid.

10 . The solvent composition of claim 7 , wherein
a proportion of the amidosulfuric acid component relative to the whole solvent composition is 0.1 ppm by mass or more.

11 . The solvent composition of claim 7 , wherein
a proportion of the amidosulfuric acid component relative to the whole solvent composition is 1 ppm by mass or more, and a proportion of the amidosulfuric acid component relative to a total amount of the electrolyte salt and the amidosulfuric acid component is 5 ppm by mass or more.

12 . The solvent composition of claim 7 , further comprising:
water at a concentration of 0.1 ppm by mass to 3000 ppm by mass.

13 . The solvent composition of claim 7 , wherein
the solvent includes a solvent having a relative permittivity of 10 or less.

14 . The solvent composition of claim 7 , wherein
the solvent includes a chain carbonate.

15 . The solvent composition of claim 14 , wherein
a proportion of the chain carbonate relative to the whole solvent is 40% by volume or more.

16 . A battery comprising:
an electrolyte solution including the solvent composition of claim 7 .

17 . A non-aqueous electrolyte solution comprising:
a sulfonylimide compound represented by the following general formula (1) as an electrolyte salt; an amidosulfuric acid component; and a solvent,
LiN(X 1 SO 2 )(X 2 SO 2 )  (1),

 where X 1 and X 2 are identical to or different from each other, and each represent a fluorine atom, an alkyl group with a carbon number of 1 to 6, or a fluoroalkyl group with a carbon number of 1 to 6; and the amidosulfuric acid component comprises at least one or more of amidosulfuric acid and a salt thereof, an amidosulfuric acid derivative and a salt thereof represented by general formula (4),
wherein the general formula (4) is R 1 R 2 NSO 2 (OM), where R 1 and R 2 each represent a hydrogen atom, an alkyl group with a carbon number of 1 to 10, a cycloalkyl group with a carbon number of 3 to 10, an aryl group with a carbon number of 6 to 16, an aralkyl group with a carbon number of 7 to 16, or an alkanoyl group with a carbon number of 2 to 16, and where M represents a hydrogen atom or a metal atom,
wherein a proportion of the amidosulfuric acid component relative to a total amount of the electrolyte salt and the amidosulfuric acid component is 0.1 ppm by mass or more to 10,000 ppm by mass or less.

18 . The non-aqueous electrolyte solution of claim 17 , wherein
the electrolyte salt further includes at least one compound selected from the group consisting of a compound represented by the following general formula (2), a compound represented by the following general formula (3), and lithium hexafluoroarsenate,
LiPF a (C m F 2m+1 ) 6-a (0≤ a≤ 6, 1≤ m≤ 4)  (2)

LiBF b (C n F 2n+1 ) 4-b (0≤ b≤ 4, 1≤ n≤ 4)  (3).

19 . The non-aqueous electrolyte solution of claim 17 , wherein
the amidosulfuric acid component includes at least one selected from amidosulfuric acid or an alkali metal salt of amidosulfuric acid.

20 . The non-aqueous electrolyte solution of claim 17 , wherein
the solvent includes a solvent having a relative permittivity of 10 or less.

21 . The non-aqueous electrolyte solution of claim 17 , wherein
the solvent includes a chain carbonate.

22 . A battery comprising:
the non-aqueous electrolyte solution of claim 17 .

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Mizuno Hiroyuki
• FUKATA Yukihiro
• Watabe Ryo
• Arakawa Motohiro
• Kobatake Takayuki
• Oyama Yusuke
• ONODA Chie

Classifications

• H01M10/0569

  characterised by the solvents · CPC title

• H01M10/0567

  characterised by the additives · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M2300/0017

  Non-aqueous electrolytes · CPC title

• H01M8/1016

  characterised by the electrolyte material (H01M8/12 takes precedence) · CPC title