# US 2025/0096274 A1 · Lithium metal secondary battery

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- Number: US 2025/0096274 A1
- Document ID: US20250096274A1
- Status: Published application
- Kind: A1
- Application number: 18/830,142
- Filed: 2024-09-10
- Published: 2025-03-20
- Earliest claimed: 2023-09-14
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Ryo Asakura; Shinya Shiotani; Sakina Kaneko
- Web page: https://patentgrep.com/patent/US20250096274A1

## CPC

- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- 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 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- H01M 2004/027: {Negative electrodes}
- 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

It is an object of the present disclosure to provide a lithium metal secondary battery capable of improving cycle property. A lithium metal secondary battery, wherein the lithium metal secondary battery comprises a negative electrode current collector layer, an alloy layer, an electrolyte layer, a positive electrode active material layer, and a positive electrode current collector layer in this order, and wherein the alloy layer comprises an alloy having indium and tin.

## Claims

### Claim 1

A lithium metal secondary battery,
wherein the lithium metal secondary battery comprises a negative electrode current collector layer, an alloy layer, an electrolyte layer, a positive electrode active material layer, and a positive electrode current collector layer in this order, and
wherein the alloy layer comprises an alloy having indium and tin.

### Claim 2 (depends on 1)

The lithium metal secondary battery according to claim 1, further comprising a lithium metal layer between the negative electrode active material layer and the alloy layer.

### Claim 3 (depends on 1)

The lithium metal secondary battery according to claim 1, the mole ratio of the indium to the tin of the alloy having indium and tin is 30/70-70/30.

### Claim 4 (depends on 1)

The lithium metal secondary battery according to claim 1, in the charged state of the lithium metal secondary battery, the thickness of alloy layer is 0.1 μm or more and 15 μm or less.

### Claim 5 (depends on 1)

The lithium metal secondary battery according to claim 1, wherein the electrolyte layer comprises a solid electrolyte.