# US 12,009,520 B2 · Secondary lithium battery anode and secondary lithium battery including same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,009,520 B2
- Document ID: US12009520B2
- Status: Granted
- Kind: B2
- Application number: 17/050,790
- Filed: 2019-03-15
- Published: 2021-03-11
- Granted: 2024-06-11
- Earliest claimed: 2018-04-26
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Jungmin Lee; Ilkyong Kwon; Myungseop Kim; Yuhyun Kim
- Web page: https://patentgrep.com/patent/US12009520B2

## CPC

- H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/623: {fluorinated polymers}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- 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

Disclosed are a secondary lithium battery anode and a secondary lithium battery including same, the secondary lithium battery anode comprising a current collector and an anode active material layer located on at least one surface of the current collector, wherein the anode active material layer includes an anode active material, which has sphericity of 0.83 to 0.91, and a binder, which has an average particle diameter (D50) of 180 nm to 450 nm.

## Claims

### Claim 1

An anode for a secondary lithium battery, comprising:
a current collector, and an anode active material layer located on at least one surface of the current collector,
wherein the anode active material layer comprises an anode active material having sphericity of 0.83 to 0.91;
a binder having an average particle diameter D50 of 180 nm to 450 nm, and
adherence between the current collector and the anode active material layer is 2 pf/mm to 4 of/mm.

### Claim 2 (depends on 1)

The anode for a secondary lithium battery of claim 1, wherein the sphericity of the anode active material is 0.83 to 0.87.

### Claim 3 (depends on 1)

The anode for a secondary lithium battery of claim 1, wherein the average particle diameter D50 of the binder is 200 nm to 400 nm.

### Claim 4 (depends on 1)

The anode for a secondary lithium battery of claim 1, wherein an amount ratio of the anode active material and the binder is 95:5 to 99:1 by weight ratio.

### Claim 5 (depends on 1)

The anode for a secondary lithium battery of claim 1, wherein the anode active material is artificial graphite, natural graphite, or a combination thereof.

### Claim 6 (depends on 1)

A secondary lithium battery comprising:
a cathode;
an anode; and
an electrolyte,
wherein the anode is the anode according to claim 1.