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

Patent metadata

Field	Value
Publication number	US-12100806-B2
Application number	US-201917056948-A
Country	US
Kind code	B2
Filing date	Sep 11, 2019
Priority date	Sep 12, 2018
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution for a lithium secondary battery, includes a lithium salt, an organic solvent, and an additive, wherein the additive includes a compound represented by Formula 1.

First claim

The invention claimed is:

1. 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 disposed between the negative electrode and the positive electrode; and
a non-aqueous electrolyte solution,
wherein the positive electrode active material comprises at least one of a lithium cobalt oxide, a lithium-nickel-manganese-cobalt-based oxide, or a lithium-manganese-based oxide,
the non-aqueous electrolyte solution comprises a lithium salt; an organic solvent; and an additive, and
the additive comprises a compound represented by Formula 1:

wherein, in Formula 1,
R 1 to R 3 are each independently a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms.

2. The lithium secondary battery of claim 1 , wherein, in Formula 1, R 1 and R 2 are each independently a substituted or unsubstituted alkyl group having 1 to 3 carbon atoms, and R 3 is a substituted or unsubstituted alkyl group having 1 or 2 carbon atoms.

3. The lithium secondary battery of claim 1 , wherein the compound represented by Formula 1 comprises at least one of compounds represented by Formulae 1a or 1b:

4. The lithium secondary battery of claim 1 , wherein the compound represented by Formula 1 is included in an amount of 0.01 wt % to 1.0 wt % based on a total weight of the non-aqueous electrolyte solution.

5. The lithium secondary battery of claim 4 , wherein the compound represented by Formula 1 is included in an amount of 0.2 wt % to 0.9 wt % based on the total weight of the non-aqueous electrolyte solution.

6. The lithium secondary battery of claim 5 , wherein the compound represented by Formula 1 is included in an amount of 0.3 wt % to 0.9 wt % based on the total weight of the non-aqueous electrolyte solution.

7. The lithium secondary battery of claim 1 , wherein the positive electrode active material comprises the lithium-manganese-based oxide.

8. The lithium secondary battery of claim 7 , wherein the lithium-manganese-based oxide comprises LiMn 2 O 4 .

Assignees

• Lg Chemical Ltd
• Lg Energy Solution Ltd

Inventors

• Kim Hyun Seung
• Lee Chul Haeng
• An Yu Ha
• Oh Jeong Woo

Classifications

• H01M2300/0025

  Organic electrolyte · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M10/0525

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

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• C07C50/04

  Benzoquinones, i.e. C6H4O2 · CPC title