# US 2025/0096249 A1 · Battery and method for producing battery

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- Number: US 2025/0096249 A1
- Document ID: US20250096249A1
- Status: Published application
- Kind: A1
- Application number: 18/824,494
- Filed: 2024-09-04
- Published: 2025-03-20
- Earliest claimed: 2023-09-20
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Ryo ASAKURA; Shinya SHIOTANI; Sakina KANEKO
- Web page: https://patentgrep.com/patent/US20250096249A1

## CPC

- H01M 4/405: {Alloys based on lithium}
- H01M 4/0445: {Forming after manufacture of the electrode, e.g. first charge, cycling}
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/1395: of electrodes based on metals, Si or alloys
- H01M 4/382: {Lithium (H01M4/405 takes precedence)}
- H01M 4/466: {Magnesium based}
- H01M 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- H01M 10/446: {Initial charging measures}
- 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

A main object of the present disclosure is to provide a battery with excellent discharge capacity properties. The present disclosure achieves the object by providing a battery utilizing a deposition and dissolution reaction of a metal lithium as an anode reaction, the battery including: layers in the order of an anode current collector, a metal layer, an electrolyte layer, and a cathode active material layer in a thickness direction, wherein the metal layer contains a Li—Mg alloy phase and a Li—In alloy phase.

## Claims

### Claim 1

A battery utilizing a deposition and dissolution reaction of a metal lithium as an anode reaction, the battery comprising:
layers in the order of an anode current collector, a metal layer, an electrolyte layer, and a cathode active material layer in a thickness direction, wherein
the metal layer contains a Li—Mg alloy phase and a Li—In alloy phase.

### Claim 2 (depends on 1)

The battery according to claim 1, wherein in the metal layer, the Li—In alloy phase is dispersed to the Li—Mg alloy phase.

### Claim 3 (depends on 1)

The battery according to claim 1, wherein in the metal layer, a proportion of In with respect to a total of In and Mg is 5 at % or more and 90 at % or less.

### Claim 4 (depends on 1)

The battery according to claim 1, wherein in the metal layer, a proportion of In with respect to a total of In and Mg is 25 at % or more and 60 at % or less.

### Claim 5 (depends on 1)

The battery according to claim 1, wherein a size of the Li—Mg alloy phase is 0.1 μm or more and 5 μm or less.

### Claim 6 (depends on 1)

The battery according to claim 1, wherein the metal layer does not contain a binder.

### Claim 7 (depends on 1)

The battery according to claim 1, wherein the electrolyte layer is a solid electrolyte layer containing a solid electrolyte.

### Claim 8 (depends on 7)

The battery according to claim 7, wherein the solid electrolyte is a sulfide solid electrolyte.

### Claim 9

A battery utilizing a deposition and dissolution reaction of a metal lithium as an anode reaction, the battery comprising:
layers in the order of an anode current collector, a metal layer, an electrolyte layer, and a cathode active material layer in a thickness direction, wherein
the metal layer contains a Mg—In alloy.

### Claim 10 (depends on 9)

The battery according to claim 9, wherein the metal layer includes a metal phase that is a Mg—In alloy phase of the Mg—In alloy.

### Claim 11 (depends on 10)

The battery according to claim 10, wherein the metal layer is a vapor deposition layer.

### Claim 12 (depends on 9)

The battery according to claim 9, wherein the metal layer contains a particle of the Mg—In alloy.

### Claim 13

A method for producing a battery utilizing a deposition and dissolution reaction of a metal lithium as an anode reaction, the method comprising:
a metal layer forming step of forming a metal layer including a Mg—In alloy phase by a vapor deposition method; and
an assembling step of assembling the battery including layers in the order of an anode current collector, the metal layer, an electrolyte layer, and a cathode active material layer in a thickness direction.

### Claim 14 (depends on 13)

The method for producing the battery according to claim 13, further comprising a charging step of charging the battery to form a Li—Mg alloy phase and a Li—In alloy phase from the Mg—In alloy phase included in the metal layer, after the assembling step.