Non-aqueous electrolyte including additive for non-aqueous electrolyte and lithium secondary battery including the same

Patent metadata

Field	Value
Publication number	US-12113173-B2
Application number	US-202218574964-A
Country	US
Kind code	B2
Filing date	Sep 29, 2022
Priority date	Sep 30, 2021
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

A non-aqueous electrolyte including an additive represented by Formula 1 is described:

wherein in Formula 1, R may be any one selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and a cycloalkenyl group having 3 to 12 carbon atoms, R 1 and R 2 may each independently be any one selected from the group consisting of hydrogen (H), an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and a cycloalkenyl group having 3 to 12 carbon atoms, and A may be an alkylene group having 1 to 5 carbon atoms.

First claim

The invention claimed is:

1. A non-aqueous electrolyte comprising an additive represented by Formula 1:

wherein in Formula 1, R is any one selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and a cycloalkenyl group having 3 to 12 carbon atoms,
R 1 and R 2 are each independently any one selected from the group consisting of hydrogen (H), an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and a cycloalkenyl group having 3 to 12 carbon atoms, and
A is an alkylene group having 1 to 5 carbon atoms.

2. The non-aqueous electrolyte of claim 1 , wherein R 1 and R 2 in Formula 1 are H.

3. The non-aqueous electrolyte of claim 1 , wherein R in Formula 1 is an alkyl group having 1 to 10 carbon atoms.

4. The non-aqueous electrolyte of claim 1 , wherein the additive represented by Formula 1 is a compound represented by Formula 1-1:

wherein; in Formula 1-1, R is an alkyl group having 1 to 10 carbon atoms, and
A is an alkylene group having 1 to 5 carbon atoms.

5. The non-aqueous electrolyte of claim 1 , wherein the additive represented by Formula 1 is a compound represented by Formula 1-2

6. The non-aqueous electrolyte of claim 1 , wherein the additive is included in an amount of 0.01 part by weight to 5 parts by weight based on 100 parts by weight of the non-aqueous electrolyte.

7. The non-aqueous electrolyte of claim 1 , further comprising LiPF 6 as a lithium salt.

8. The non-aqueous electrolyte of claim 7 , wherein the LiPF 6 is included in a concentration of 0.5 M to 4 M.

9. The non-aqueous electrolyte of claim 7 , further comprising at least a second lithium salt selected from LiCl, LiBr, LiI, LiBF 4 , LiClO 4 , LiB 10 Cl 10 , LiAlCl 4 , LiAlO 2 , LiCF 3 SO 3 , LiCH 3 CO 2 , LiCF 3 CO 2 , LiAsF 6 , LiSbF 6 , LiCH 3 SO 3 , LiN(SO 2 F) 2 , LiN(SO 2 CF 2 CF 3 ) 2 , or LiN(SO 2 CF 3 ) 2 .

10. The non-aqueous electrolyte of claim 1 , further comprising an organic solvent.

11. The non-aqueous electrolyte of claim 10 , wherein the organic solvent comprises at least one of a cyclic carbonate-based organic solvent, a linear carbonate-based organic solvent, a linear ester-based organic solvent, or a cyclic ester-based organic solvent.

12. The non-aqueous electrolyte of claim 1 , further comprising at least one of a cyclic carbonate-based compound, a halogen-substituted carbonate-based compound, a sultone-based compound, a sulfate-based compound, a phosphate-based compound, a borate-based compound, a nitrile-based compound, a benzene-based compound, an amine-based compound, a silane-based compound, or a lithium salt-based compound, as a second additive.

13. A lithium secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a separator disposed between the positive electrode and the negative electrode, and the non-aqueous electrolyte of claim 1 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Kim Hyung Tae
• Lee Chul Haeng
• Oh Jeong Woo
• Park Byung Chun
• Seo Young Mi
• Park Sung Guk

Classifications

• H01M2300/0037

  Mixture of solvents · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M10/0525

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

• C07D207/335

  Radicals substituted by nitrogen atoms not forming part of a nitro radical · CPC title

• H01M10/052 Primary

  Li-accumulators · CPC title