# US 2024/0204249 A1 · Additive for non-aqueous electrolyte, and non-aqueous electrolyte and lithium secondary battery which include the same

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- Number: US 2024/0204249 A1
- Document ID: US20240204249A1
- Status: Published application
- Kind: A1
- Application number: 18/287,823
- Filed: 2022-10-25
- Published: 2024-06-20
- Earliest claimed: 2021-10-26
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Energy Solution, Ltd.
- Inventors: Won Kyung SHIN; Kyoung Ho AHN; Jun Hyeok HAN; Young Ho OH; Chul Haeng LEE; Won Tae LEE; Su Hyeon JI; You Kyeong JEONG
- Web page: https://patentgrep.com/patent/US20240204249A1

## CPC

- H01M 10/0567: characterised by the additives
- C07C 69/65: of unsaturated acids
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 50/383: Flame arresting or ignition-preventing means
- H01M 2300/0042: Four or more solvents
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure relates to an additive for a non-aqueous electrolyte, which includes a compound represented by Formula 1 capable of improving life characteristics of a lithium secondary battery by forming a stable and low-resistance electrode-electrolyte interface even at a high temperature, and a non-aqueous electrolyte and a lithium secondary battery which include the same.

## Claims

### Claim 1

An additive for a non-aqueous electrolyte, the additive comprising a compound represented by Formula 1:
wherein, in the Formula 1,
n is an integer of 2 to 20.

### Claim 2 (depends on 1)

The additive for a non-aqueous electrolyte of claim 1, wherein, in the Formula 1, n is an integer of 3 to 15.

### Claim 3 (depends on 1)

The additive for a non-aqueous electrolyte of claim 1, wherein, in the Formula 1, n is an integer of 4 to 10.

### Claim 4 (depends on 1)

The additive for a non-aqueous electrolyte of claim 1, wherein the compound represented by the Formula 1 includes at least one of compounds represented by Formulae 1-1 to 1-3:

### Claim 5 (depends on 1)

A non-aqueous electrolyte for a lithium secondary battery, the non-aqueous electrolyte comprising a lithium salt, an organic solvent, and the additive of claim 1,
wherein the additive is present in an amount of up to 9.0 wt % based on a total weight of the non-aqueous electrolyte.

### Claim 6 (depends on 5)

The non-aqueous electrolyte for a lithium secondary battery of claim 5, wherein the additive is present in an amount of 0.1 wt % to 7.0 wt % based on the total weight of the non-aqueous electrolyte.

### Claim 7 (depends on 5)

The non-aqueous electrolyte for a lithium secondary battery of claim 5, wherein the additive is present in an amount of 0.1 wt % to 5.0 wt % based on the total weight of the non-aqueous electrolyte.

### Claim 8 (depends on 5)

The non-aqueous electrolyte for a lithium secondary battery of claim 5, further comprising at least one other additive selected from the group consisting of a cyclic carbonate-based compound, a halogen-substituted carbonate-based compound, a nitrile-based compound, a phosphate-based compound, a borate-based compound, and a lithium salt-based compound.

### Claim 9 (depends on 5)

A lithium secondary battery comprising a positive electrode; a negative electrode; a separator disposed between the negative electrode and the positive electrode; and
the non-aqueous electrolyte of claim 5.