# US 12,009,491 B2 · Lithium secondary battery

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

- Number: US 12,009,491 B2
- Document ID: US12009491B2
- Status: Granted
- Kind: B2
- Application number: 17/474,684
- Filed: 2021-09-14
- Published: 2022-03-17
- Granted: 2024-06-11
- Earliest claimed: 2020-09-15
- Assignees: SK On Co., Ltd.
- Applicants: SK Innovation Co., Ltd.
- Inventors: Sang Han Lee; Yong Hyun Cho; Min Gu Kang; Min Suk Kang; Yoon Ji Lee
- Web page: https://patentgrep.com/patent/US12009491B2

## CPC

- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 10/52: Removing gases inside the secondary cell, e.g. by absorption (vent plugs or other mechanical arrangements for facilitating escape of gases H01M50/30)
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A lithium secondary battery according to an embodiment of the present invention includes an electrode assembly including a separation layer, and a plurality of cathodes and a plurality of anodes separated by the separation layer and repeatedly stacked, and a gas adsorption layer coated on a single surface of an outermost anode among the plurality of anodes.

## Claims

### Claim 1

A lithium secondary battery, comprising:
an electrode assembly comprising:
a separation layer; and
a plurality of cathodes and a plurality of anodes separated by the separation layer and repeatedly stacked; and
a gas adsorption layer coated only on a single surface of each of an uppermost anode and a lowermost anode among the plurality of anodes included in the electrode assembly,
wherein each of the plurality of anodes comprises an anode current collector and an anode active material layer, and the gas adsorption layer contacts the anode active material layer.

### Claim 2 (depends on 1)

The lithium secondary battery of claim 1, wherein
the anode active material layer comprises
an upper anode active material layer and a lower anode active material layer formed on a top surface and a bottom surface of the anode current collector, respectively.

### Claim 3 (depends on 2)

The lithium secondary battery of claim 2, wherein the gas adsorption layer is coated on an anode active material layer that does not face a cathode adjacent to the outermost anode of the upper anode active material layer and the lower anode active material layer.

### Claim 4 (depends on 3)

The lithium secondary battery of claim 3, wherein the gas adsorption layer includes gas adsorption particles, and an amount of the gas adsorption particles is from 0.1 wt % to 20 wt % based on a total weight of the anode active material layer that does not face the cathode adjacent to the outermost anode.

### Claim 5 (depends on 1)

The lithium secondary battery of claim 1, wherein the gas adsorption layer includes at least one selected from the group consisting of activated carbon, soda lime, zeolite, carboxymethyl cellulose (CMC), diethanol amine (DEA), triethanolamine (TEA), N-methyldiethanolamine (MDEA) and a diene-based compound.