# US 12,218,358 B2 · All-solid-state secondary battery

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- Number: US 12,218,358 B2
- Document ID: US12218358B2
- Status: Granted
- Kind: B2
- Application number: 17/241,200
- Filed: 2021-04-27
- Published: 2021-10-28
- Granted: 2025-02-04
- Earliest claimed: 2020-04-28
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Toshinori Sugimoto; Saebom Ryu; Junhwan Ku; Youngeal Kim
- Web page: https://patentgrep.com/patent/US12218358B2

## CPC

- H01M 4/625: {Carbon or graphite}
- H01M 4/04: Processes of manufacture in general
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/366: {as layered products}
- H01M 4/38: of elements or alloys
- H01M 4/382: {Lithium (H01M4/405 takes precedence)}
- H01M 4/405: {Alloys based on lithium}
- H01M 4/667: {in the form of layers, e.g. coatings}
- 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 10/0562: Solid materials
- H01M 2004/027: {Negative electrodes}
- 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

An all-solid-state secondary battery includes: a cathode layer including a cathode active material, an anode layer including an anode current collector and an anode active material layer disposed on the anode current collector, the anode active material layer including an anode active material and amorphous carbon, and a solid electrolyte layer disposed between the cathode active material layer and the anode active material layer, wherein a weight ratio of the anode active material to the amorphous carbon is 1:3 to 1:1, and the anode layer has sheet resistance of about 0.5 milliohms-centimeters or less.

## Claims

### Claim 1

An all-solid-state secondary battery comprising:
a cathode layer comprising a cathode active material;
an anode layer comprising an anode current collector and an anode active material layer disposed on the anode current collector, the anode active material layer comprising an anode active material which is silver and amorphous carbon which is carbon black; and
a solid electrolyte layer disposed between the cathode active material layer and the anode active material layer,
wherein a weight ratio of the anode active material to the amorphous carbon is about 1:3, and
the anode layer has sheet resistance of about 0.5 milliohms-centimeters or less.

### Claim 2 (depends on 1)

The all-solid-state secondary battery of claim 1, wherein the anode active material is contained in an amount of about 1 weight percent to 40 weight percent, based on a total weight of the anode active material layer.

### Claim 3 (depends on 1)

The all-solid-state secondary battery of claim 1, wherein the anode active material layer further comprises a binder.

### Claim 4 (depends on 3)

The all-solid-state secondary battery of claim 3, wherein the binder is contained in an amount of about 0.3 weight percent to about 15 weight percent, based on a total weight of the anode active material.

### Claim 5 (depends on 1)

The all-solid-state secondary battery of claim 1, wherein the anode active material layer has a thickness in a range of about 1 micrometer to 20 micrometers.

### Claim 6 (depends on 1)

The all-solid-state secondary battery of claim 1, further comprising a metal layer disposed between the anode current collector and the anode active material layer, wherein the metal layer comprises at least one of lithium or a lithium alloy.

### Claim 7 (depends on 6)

The all-solid-state secondary battery of claim 6, wherein the metal layer is disposed between the anode current collector and the anode active material layer before the all-solid-state secondary battery is charged.

### Claim 8 (depends on 7)

The all-solid-state secondary battery of claim 7, wherein the metal layer has a thickness in a range of about 1 micrometer to 200 micrometers.

### Claim 9 (depends on 6)

The all-solid-state secondary battery of claim 6, wherein the metal layer is disposed between the anode current collector and the anode active material layer does not comprise lithium.

### Claim 10 (depends on 1)

The all-solid-state secondary battery of claim 1, further comprising a film including an element alloyable with lithium on the anode current collector,
wherein the film is disposed between the anode current collector and the anode active material layer.

### Claim 11 (depends on 10)

The all-solid-state secondary battery of claim 10, wherein the film has a thickness in a range of about 1 nanometer to about 500 nanometers.

### Claim 12 (depends on 1)

The all-solid-state secondary battery of claim 1, wherein the anode current collector, the anode active material layer, and a region therebetween are lithium-free regions.

### Claim 13 (depends on 1)

The all-solid-state secondary battery of claim 1, wherein the anode layer has sheet resistance of about 0.5 milliohm-centimeters to about 0.001 milliohm-centimeters.

### Claim 14 (depends on 1)

The all-solid-state secondary battery of claim 1, wherein the amorphous carbon has a specific surface area of 100 square meters per gram to about 5000 square meters per gram.

### Claim 15 (depends on 1)

A method of manufacturing an all solid-state secondary battery, the method comprising:
providing a cathode including a cathode active material;
providing an anode including an anode current collector and an anode active material layer disposed on the anode current collector, wherein the anode active material layer comprises an anode active material which is silver and amorphous carbon which is carbon black; and
disposing a solid electrolyte layer between the cathode active material layer and the anode active material layer,
wherein a weight ratio of the anode active material to the amorphous carbon is about 1:3, and
the anode layer has sheet resistance of about 0.5 mΩ cm or less, to manufacture the all-solid-state battery of claim 1.