# US 12,183,885 B2 · Electrolyte for lithium secondary battery and lithium secondary battery including the same

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- Number: US 12,183,885 B2
- Document ID: US12183885B2
- Status: Granted
- Kind: B2
- Application number: 17/425,129
- Filed: 2020-01-23
- Published: 2022-04-14
- Granted: 2024-12-31
- Earliest claimed: 2019-01-25
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Energy Solution, Ltd.
- Inventors: Yu Ha An; Hyun Seung Kim; Jeong Woo Oh; Chul Haeng Lee
- Web page: https://patentgrep.com/patent/US12183885B2

## CPC

- H01M 10/0567: characterised by the additives
- H01M 4/364: {as mixtures}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 4/587: for inserting or intercalating light metals
- H01M 2004/027: {Negative electrodes}
- H01M 2300/0025: Organic electrolyte
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An electrolyte for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, an electrolyte includes a lithium salt, an organic solvent, and an additive, wherein the additive includes a compound represented by Formula 1 and a compound represented by Formula 2.

## Claims

### Claim 1

An electrolyte for a lithium secondary battery, the electrolyte consisting of:
a lithium salt;
an organic solvent;
an additive; and
optionally an additional additive,
wherein the additive consists of a compound represented by Formula 1h and a compound represented by Formula 2b:

### Claim 2 (depends on 1)

The electrolyte for a lithium secondary battery of claim 1, wherein the compound represented by Formula 1h is present in an amount of 0.01 part by weight to 2 parts by weight based on 100 parts by weight of the electrolyte.

### Claim 3 (depends on 1)

The electrolyte for a lithium secondary battery of claim 1, wherein the compound represented by Formula 1h and the compound represented by Formula 2b are present in a weight ratio of 2:1 to 2:20.

### Claim 4 (depends on 1)

The electrolyte for a lithium secondary battery of claim 1, wherein the compound represented by Formula 1h and the compound represented by Formula 2b are present in a weight ratio of 2:1 to 2:18.

### Claim 5 (depends on 1)

A lithium secondary battery, comprising:
a positive electrode;
a negative electrode; and
the electrolyte of claim 1,
wherein the negative electrode comprises a carbon-based negative electrode active material and a silicon-based negative electrode active material.