# US 12,603,403 B2 · Electrode structure and all-solid secondary battery including the same

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

- Number: US 12,603,403 B2
- Document ID: US12603403B2
- Status: Granted
- Kind: B2
- Application number: 17/661,198
- Filed: 2022-04-28
- Published: 2022-11-10
- Granted: 2026-04-14
- Earliest claimed: 2021-05-06
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Hongjeong Kim; Younggyoon Ryu; Jaegu Yoon; Minsuk Lee
- Web page: https://patentgrep.com/patent/US12603403B2

## CPC

- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 50/572: Means for preventing undesired use or discharge
- H01M 10/0562: Solid materials
- H01M 50/474: characterised by their position inside the cells
- H01M 50/48: characterised by the material
- H01M 50/483: Inorganic material
- H01M 50/486: Organic material
- H01M 50/489: Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2300/0068: inorganic
- 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

Provided are an electrode structure and an all-solid secondary battery including the electrode structure, the electrode structure including a cathode layer, an anode layer, and a solid electrolyte layer between the cathode layer and the anode layer, the cathode layer including a cathode current collector and a cathode active material layer on at least one surface of the cathode current collector, the anode layer including an anode current collector and an anode active material layer on at least one surface of the anode current collector, and the solid electrolyte having a margin of about 2% or less of a width of the solid electrolyte layer, at two ends in a width direction, and an insulating layer having a storage elastic modulus (E′) of greater than about 4.0 GPa being at two sides integrally surrounding the cathode layer, the anode layer, and the solid electrolyte layer.

## Claims

### Claim 1

An electrode structure comprising:
a cathode layer;
an anode layer; and
a solid electrolyte layer between the cathode layer and the anode layer,
wherein the cathode layer comprises a cathode current collector and a cathode active material layer on at least one surface of the cathode current collector,
the anode layer comprises an anode current collector and an anode active material layer on at least one surface of the anode current collector, and
the solid electrolyte layer has a margin that is about 2% or less of a width of the solid electrolyte layer, at two ends in a width direction,
wherein an insulating layer having a storage elastic modulus (E′) of greater than about 4.0 GPa is at two sides integrally surrounding the cathode layer, the anode layer, and the solid electrolyte layer,
wherein the solid electrolyte layer protrudes further into the insulating layer than the cathode layer and the anode layer, and
wherein the solid electrolyte layer does not protrude into the insulating layer more than about 2% of the width of the solid electrolyte layer at the two ends in the width direction.

### Claim 2 (depends on 1)

The electrode structure of claim 1, wherein the insulating layer has a loss tangent (tan δ) of less than about 0.5.

### Claim 3 (depends on 1)

The electrode structure of claim 1, wherein the insulating layer has a resistivity of about 1×106 ohm-cm or greater.

### Claim 4 (depends on 1)

The electrode structure of claim 1, wherein the insulating layer is at least one layer.

### Claim 5 (depends on 1)

The electrode structure of claim 1, wherein the insulating layer comprises a polymer or a composite of a polymer and an inorganic material.

### Claim 6 (depends on 5)

The electrode structure of claim 5, wherein the polymer comprises a fluorine-based polymer, a cellulose-based polymer, an epoxy-based resin, or a combination thereof.

### Claim 7 (depends on 5)

The electrode structure of claim 5, wherein a volume ratio of the polymer in the composite of the polymer and the inorganic material is about 50 vol % or greater based on 100 vol % of a total composition forming the composite.

### Claim 8 (depends on 5)

The electrode structure of claim 5, wherein the inorganic material comprises a metal oxide, a metal hydroxide, or a combination thereof.

### Claim 9 (depends on 1)

The electrode structure of claim 1, wherein a mixture density of the cathode active material layer is about 3.0 g/cc or greater.

### Claim 10 (depends on 1)

The electrode structure of claim 1, wherein the cathode active material layer comprises a sulfide-based solid electrolyte.

### Claim 11 (depends on 1)

The electrode structure of claim 1, wherein the anode active material layer comprises at least one selected from a carbonaceous anode active material and a metal or metalloid anode active material.

### Claim 12 (depends on 11)

The electrode structure of claim 11, wherein the carbonaceous anode active material comprises at least one selected from amorphous carbon and crystalline carbon.

### Claim 13 (depends on 11)

The electrode structure of claim 11, wherein the metal or metalloid anode active material comprises at least one selected from gold (Au), platinum (Pt), palladium (Pd), silicon (Si), silver (Ag), aluminum (Al), bismuth (Bi), tin (Sn), and zinc (Zn).

### Claim 14 (depends on 1)

The electrode structure of claim 1, wherein the solid electrolyte layer comprises at least one selected from Li7−xPS6−xClx, Li7−xPS6−xBrx, and Li7−xPS6−xIx, wherein 0≤x≤2.

### Claim 15 (depends on 1)

The electrode structure of claim 1, wherein a peel strength of the solid electrolyte layer to the cathode layer or the anode layer is about 0.2 gf/mm or greater.

### Claim 16 (depends on 1)

The electrode structure of claim 1, wherein the electrode structure has a jelly-roll form or a stack form.

### Claim 17 (depends on 1)

An all-solid secondary battery comprising the electrode structure of claim 1.