Nonaqueous electrolyte solution

Patent metadata

Field	Value
Publication number	US-12418046-B2
Application number	US-202217591329-A
Country	US
Kind code	B2
Filing date	Feb 2, 2022
Priority date	Aug 8, 2019
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A non-aqueous electrolyte solution includes a positive electrode and a negative electrode that are capable of occluding and releasing metal ions, and the non-aqueous electrolyte solution is characterized by containing an alkali metal salt, a non-aqueous solvent, at least one Si—O structure-containing compound represented by Formula (A) or (B), and a compound represented by Formula (α).

First claim

What is claimed is:

1. A non-aqueous electrolyte solution comprising:
an alkali metal salt; a non-aqueous solvent; at least one Si—O structure-containing compound represented by Formula (A) or (B); and a compound represented by Formula (α):

wherein, in Formula (A),
R 1 to R 5 each independently represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or an optionally substituted alkoxy group having 1 to 12 carbon atoms;
X represents an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or a silyl group represented by —SiR o R p R q , wherein R o to R q each independently represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or an optionally substituted alkoxy group having 1 to 12 carbon atoms;
n represents an integer of 0 to 5; and
when n is 2 or larger, plural R 4 s in Formula (A) are the same or different from each other, and plural R 5 s in Formula (A) are the same or different from each other

wherein, in Formula (B),
R 6 and R 7 each independently represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or an optionally substituted alkoxy group having 1 to 12 carbon atoms;
k represents an integer of 3 to 6;
plural R 6 s in Formula (B) are the same or different from each other; and
plural R 7 s in Formula (B) are the same or different from each other,

wherein, in Formula (α),
R 89 represents a hydrogen atom or a silyl group represented by —SiR 8 R 9 R 10 , wherein R 8 to R 10 each independently represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or an optionally substituted alkoxy group having 1 to 12 carbon atoms;
R 11 represents a hydrogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or a silyl group represented by —SiR d R e R f , wherein R d to R f each independently represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or an optionally substituted alkoxy group having 1 to 12 carbon atoms;
Y represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, an optionally substituted alkoxy group having 1 to 12 carbon atoms, a group represented by —NR g —SiR h R i R j , or a group represented by —NR g —H, wherein R g represents a hydrogen atom or an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, and R h to R j each independently represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or an optionally substituted alkoxy group having 1 to 12 carbon atoms; and
R 11 and R g are optionally bound with each other to form a ring.

2. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the Si—O structure-containing compound represented by Formula (A) or (B) is 0.001% by mass to 10% by mass with respect to a total amount of the non-aqueous electrolyte solution.

3. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the compound represented by Formula (α), which has an Si—N structure, is 0.01 ppm by mass to 0.5% by mass with respect to the total amount of the non-aqueous electrolyte solution.

4. The non-aqueous electrolyte solution according to claim 1 , wherein a mass ratio of a content of the Si—O structure-containing compound represented by Formula (A) or (B) with respect to a content of the compound represented by Formula (α) is 1.0 to 10,000.

5. The non-aqueous electrolyte solution according to claim 1 , wherein at least one of R 1 to R 3 is a hydrocarbon group having 2 to 12 carbon atoms and an unsaturated carbon-carbon bond.

6. The non-aqueous electrolyte solution according to claim 1 , further comprising at least one selected from a fluorinated salt, a fluorosilane compound, an unsaturated cyclic carbonate, a fluorine atom-containing cyclic carbonate, and an oxalate salt.

7. A non-aqueous electrolyte battery, comprising:
a positive electrode and a negative electrode which are capable of occluding and releasing metal ions; and
the non-aqueous electrolyte solution according to claim 1 .

8. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the Si—O structure-containing compound represented by Formula (A) or (B) is 0.01% by mass to 8% by mass with respect to a total amount of the non-aqueous electrolyte solution.

9. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the Si—O structure-containing compound represented by Formula (A) or (B) is 0.1% by mass to 6% by mass with respect to a total amount of the non-aqueous electrolyte solution.

10. The non-aqueous electrolyte solution according to claim 1 , wherein the compound represented by Formula (α) is a compound represented by Formula (α1):

wherein, in Formula (α1),
R8 to R10 each independently represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, or an optionally substituted alkoxy group having 1 to 12 carbon atoms.

11. The non-aqueous electrolyte solution according to claim 1 , wherein the compound represented by Formula (α) is a compound represented by Formula (α2):

wherein, in Formula (α2),
R 111 represents a hydrogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms; and
Y″ represents a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms, an optionally substituted alkoxy group having 1 to 12 carbon atoms, or a group represented by —NRg—H, wherein Rg represents a hydrogen atom, an optionally substituted hydrocarbon group having 1 to 12 carbon atoms.

12. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the Si—O structure-containing compound represented by Formula (A) or (B) is 0.01% by mass to 8% by mass with respect to a total amount of the non-aqueous electrolyte solution.

13. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the Si—O structure-containing compound represented by Formula (A) or (B) is 0.1% by mass to 6.0% by mass with respect to a total amount of the non-aqueous electrolyte solution.

14. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the Si—O structure-containing compound represented by Formula (A) or (B) is 0.2% by mass to 4.0% by mass with respect to a total amount of the non-aqueous electrolyte solution.

15. The non-aqueous electrolyte solution according to claim 1 , wherein a content of the Si—O structure-containing compound represented by Formula (A) or (B) is 0.01% by mass to 8% by mass with respect to a total amount of the non-aqueous electrolyte solution.

16. The non-aqueous ele

Assignees

• Mitsubishi Chem Corp
• Mu Ionic Solutions Corp

Inventors

• Nakazawa Eiji

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M10/4235

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2220/30

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

• H01M2220/20

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