Boron-containing compound and electrolyte solution additive for secondary battery including the same

Patent metadata

Field	Value
Publication number	US-12129270-B2
Application number	US-202318502094-A
Country	US
Kind code	B2
Filing date	Nov 6, 2023
Priority date	Dec 21, 2021
Publication date	Oct 29, 2024
Grant date	Oct 29, 2024

Abstract

Provided are a novel boron-containing compound and an electrolyte solution additive for a secondary battery including the same. The electrolyte solution for a secondary battery provided in one embodiment includes the novel boron-containing compound, thereby suppressing the decomposition of an electrolyte solution to improve the capacity and the life characteristics of a battery.

First claim

The invention claimed is:

1. An electrolyte for a secondary battery comprising an oligomer or polymer prepared from a compound represented by the following Chemical Formula 1 as a monomer:

wherein
X 1 and X 2 are independently of each other a substituted or unsubstituted compound represented by the above Chemical Formula 2;
X 3 and X 4 are independently of each other hydrogen, halogen, substituted or unsubstituted C 1-15 alkyl, substituted or unsubstituted C 2-15 alkenyl, or the substituted or unsubstituted compound represented by the above Chemical Formula 2; and
n and m are independently of each other an integer of 0 to 15, and A is a bond or —C(═O)—.

2. The electrolyte of claim 1 ,
wherein X 1 and X 2 are independently of each other the substituted or unsubstituted compound represented by the above Chemical Formula 2;
X 3 and X 4 are independently of each other hydrogen, halogen, substituted or unsubstituted C 1-10 alkyl, substituted or unsubstituted C 2-10 alkenyl, or the substituted or unsubstituted compound represented by the above Chemical Formula 2; and
n and m are independently of each other an integer of 0 to 10, and A is a bond.

3. The electrolyte of claim 1 ,
wherein the compound represented by Chemical Formula 2 is any one selected from the group consisting of the following compounds:

4. The electrolyte of claim 1 , wherein the compound represented by Chemical Formula 1 is any one selected from the group consisting of compounds represented by the following chemical formulae:

5. The electrolyte of claim 1 , the electrolyte further comprises a solvent which is selected from ether compound, ester compound, amide compound, linear carbonate compound, cyclic carbonate compound, or nitrile compound.

6. The electrolyte of claim 1 , the oligomer or polymer is comprised in an amount of 0.1 wt % to 20 wt % with respect to the total weight of the electrolyte.

7. A protective film of an electrode comprising an oligomer or polymer prepared from a compound represented by the following Chemical Formula 1 as a monomer:

wherein
X 1 and X 2 are independently of each other a substituted or unsubstituted compound represented by the above Chemical Formula 2;
X 3 and X 4 are independently of each other hydrogen, halogen, substituted or unsubstituted C 1-15 alkyl, substituted or unsubstituted C 2-15 alkenyl, or the substituted or unsubstituted compound represented by the above Chemical Formula 2; and

n and m are independently of each other an integer of 0 to 15, and A is a bond or —C(═O)—.

8. A secondary battery comprising the electrolyte according to claim 1 .

9. The electrolyte of claim 1 , wherein the electrolyte further comprises a polymerization initiator.

10. The electrolyte of claim 1 , wherein the oligomer or polymer has a weight average molecular weight of 1,000 g/mol to 30,000 g/mol.

11. The protective film of claim 7 , wherein the protective film is a gel-polymer film.

Assignees

• Sk On Co Ltd

Inventors

• Kim Myoung Lae
• Kim Chanwoo
• Shim Yu Na
• Ryu Jaechan
• Lee Cholho
• Lee Han Sol

Classifications

• H01M2300/0037

  Mixture of solvents · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M10/05

  Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title