Non-Aqueous Electrolyte Including Additive for Non-Aqueous Electrolyte, and Lithium Secondary Battery Including the Non-Aqueous Electrolyte

Patent metadata

Field	Value
Publication number	US-2023101481-A1
Application number	US-202217956064-A
Country	US
Kind code	A1
Filing date	Sep 29, 2022
Priority date	Sep 30, 2021
Publication date	Mar 30, 2023
Grant date	—

Abstract

The present disclosure provides a non-aqueous electrolyte including an additive for a non-aqueous electrolyte represented by Formula 1 below:wherein, R1 to R5 may each independently be any one selected from the group consisting of H, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, and a nitrile group.

First claim

What is claimed is:

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

wherein in Formula 1, R 1 to R 5 are each independently any one selected from the group consisting of H, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, and a nitrile group.

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

3 . The non-aqueous electrolyte of claim 1 , wherein R 1 to R 5 of Formula 1 is H.

4 . The non-aqueous electrolyte of claim 1 , wherein the additive is included in a content of 0.01 parts by weight to 5 parts by weight based on 100 parts by weight of the non-aqueous electrolyte.

5 . The non-aqueous electrolyte of claim 1 , further comprising a lithium salt selected from LiCl, LiBr, LiI, LiBF 4 , LiClO 4 , LiB 10 Cl 10 , LiAlCl 4 , LiAlO 2 , LiPF 6 , 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 , LiN(SO 2 CF 3 ) 2 , or a combination thereof.

6 . The non-aqueous electrolyte of claim 5 , wherein the lithium salt is LiPF 6.

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

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

9 . The non-aqueous electrolyte of claim 8 , wherein the organic solvent comprises at least one organic solvent selected from the group consisting of a cyclic carbonate-based organic solvent, a linear carbonate-based organic solvent, a linear ester-based organic solvent, and a cyclic ester-based organic solvent.

10 . The non-aqueous electrolyte of claim 9 , wherein the cyclic carbonate-based organic solvent comprises at least one selected from the group consisting of ethylene carbonate (EC), propylene carbonate (PC), 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate, and vinylene carbonate.

11 . The non-aqueous electrolyte of claim 9 , wherein the linear carbonate-based organic solvent comprises at least one selected from the group consisting of dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate, ethylmethyl carbonate (EMC), methylpropyl carbonate, and ethylpropyl carbonate.

12 . The non-aqueous electrolyte of claim 9 , wherein the linear ester-based organic solvent comprises at least one selected from the group consisting of methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, and butyl propionate.

13 . The non-aqueous electrolyte of claim 9 , wherein the cyclic ester-based organic solvent comprises at least one selected from the group consisting of γ-butyrolactone, γ-valerolactone, γ-caprolactone, σ-valerolactone, and ε-caprolactone.

14 . The non-aqueous electrolyte of claim 8 , wherein the organic solvent comprises a cyclic carbonate-based organic solvent, a linear carbonate-based organic solvent, or a combination thereof.

15 . The non-aqueous electrolyte of claim 1 , further comprising one or more compounds selected from the group consisting 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, and a lithium salt-based compound as an additive.

16 . A lithium secondary battery comprising a positive electrode comprising a positive electrode active material, a negative electrode comprising a negative electrode active material, a separator interposed 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

• H01M10/0569

  characterised by the 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

• H01M10/052

  Li-accumulators · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title