# US 12,113,210 B2 · Electrode for all-solid-state battery and all-solid-state battery

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- Number: US 12,113,210 B2
- Document ID: US12113210B2
- Status: Granted
- Kind: B2
- Application number: 17/637,158
- Filed: 2021-03-11
- Published: 2022-09-08
- Granted: 2024-10-08
- Earliest claimed: 2020-03-13
- Assignees: Maxell, Ltd.
- Applicants: Maxell, Ltd.
- Inventors: Kentaro Tomita; Naoki Matsuoka; Hiroyoshi Aoki; Haruki Kamizori
- Web page: https://patentgrep.com/patent/US12113210B2

## CPC

- H01M 4/366: {as layered products}
- 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 10/0562: Solid materials
- H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
- H01M 50/105: Pouches or flexible bags
- H01M 50/109: of button or coin shape
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/028: {Positive electrodes}
- H01M 2300/0068: inorganic
- H01M 2300/008: Halides
- 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

An all-solid-state battery having excellent load characteristics, and an electrode for an all-solid-state battery for forming the all-solid-state battery are provided. It relates to Goals 12, 3, 7, and 11 of Sustainable Development Goals (SDGs). The electrode for an all-solid-state battery includes a molded body of a mixture containing an active material-containing electrode material, a solid electrolyte, and a conductive assistant. The electrode material is in the form of a composite particle having a layer containing a solid electrolyte A1 or solid electrolyte A2 that contains certain elements on its surface. The mixture molded body includes a solid electrolyte B1 or solid electrolyte B2 that contains certain elements between the composite particles. The compositions of the solid electrolyte A1 and the solid electrolyte B1 satisfy a certain relationship, or the composition of the solid electrolyte A2 and the composition of the solid electrolyte B2 satisfy a certain relationship.

## Claims

### Claim 1

An electrode for an all-solid-state battery to be used in an all-solid-state battery, the electrode comprising
a molded body made of a mixture that contains an active material-containing electrode material and a solid electrolyte,
wherein the electrode material is in the form of a composite particle that includes a layer containing a sulfide-based solid electrolyte A1 on at least a portion of its surface,
the mixture molded body includes a sulfide-based solid electrolyte B1 between the composite particles,
the solid electrolyte A1 and the solid electrolyte B1 contain elemental phosphorus, elemental sulfur, and a halogen Y including at least one of Cl and Br, and optionally at least one element X selected from the group consisting of Si, Ge, and Sn, and when the sum of molar ratios of the elemental phosphorus and the element X is taken as 1, a molar ratio c of the element X satisfies 0≤c<0.5, and
molar ratios of Cl and Br in the Y element contained in the solid electrolyte A1 satisfy a relationship Cl>Br, and molar ratios of Cl and Br in the Y element contained in the solid electrolyte B1 satisfy a relationship Cl≤Br.

### Claim 2 (depends on 1)

The electrode for an all-solid-state battery according to claim 1,
wherein the solid electrolyte A1 and the solid electrolyte B1 are represented by General Formula (1):
Li7-a+bP1-cXcS6-aYa+b (1)
where X is Si, Ge, or Sn, Y is a halogen including at least one of Cl and Br, and a, b, and e satisfy 0≤b≤0.9, −3.0a+1.8≤b≤−3.0a+5.7, and 0≤c≤1.

### Claim 3 (depends on 1)

The electrode for an all-solid-state battery according to claim 1,
wherein the solid electrolyte A1 and the solid electrolyte B1 are of an argyrodite type.

### Claim 4 (depends on 1)

The electrode for an all-solid-state battery according to claim 1,
wherein the layer containing the solid electrolyte A1 in the electrode material further contains a conductive assistant.

### Claim 5 (depends on 1)

The electrode for an all-solid-state battery according to claim 1,
wherein the molded body is formed on a current collector.

### Claim 6 (depends on 1)

The electrode for an all-solid-state battery according to claim 1,
wherein the electrode material includes a reaction suppressing layer for suppressing a reaction between the active material and the solid electrolyte on at least a portion of a surface of the active material.

### Claim 7 (depends on 1)

The electrode for an all-solid-state battery according to claim 1,
wherein the mixture molded body further contains a conductive assistant.

### Claim 8

An electrode for an all-solid-state battery to be used in an all-solid-state battery, the electrode comprising
a molded body made of a mixture that contains an active material-containing electrode material and a solid electrolyte,
wherein the electrode material is in the form of a composite particle that includes a layer containing a sulfide-based solid electrolyte A2 on at least a portion of its surface,
the mixture molded body includes a sulfide-based solid electrolyte B2 between the composite particles,
the solid electrolyte A2 and the solid electrolyte B2 contain elemental phosphorus, elemental sulfur, at least one element X selected from the group consisting of Si, Ge, and Su, and a halogen Y including at least one of Cl and Br, and when the sum of molar ratios of the elemental phosphorus and the element X is taken as 1, a molar ratio c of the element X satisfies c≥0.5, and
molar ratios of Cl and Br in the Y element contained in the solid electrolyte A2 satisfy a relationship Cl≤Br, and molar ratios of Cl and Br in the Y element contained in the solid electrolyte B2 satisfy a relationship Cl>Br.

### Claim 9 (depends on 8)

The electrode for an all-solid-state battery according to claim 8,
wherein the solid electrolyte A2 and the solid electrolyte B2 are represented by General Formula (1):
Li7-a+bP1-cXcS6-aYa+b (1)
where X is Si, Ge, or Sn, Y is a halogen including at least one of Cl and Br, and a, b, and c satisfy 0≤b≤0.9, −3.0a+1.8≤b≤−3.0a+5.7, and 0≤c≤1.

### Claim 10 (depends on 8)

The electrode for an all-solid-state battery according to claim 8,
wherein the solid electrolyte A2 and the solid electrolyte B2 are of an argyrodite type.

### Claim 11 (depends on 8)

The electrode for an all-solid-state battery according to claim 8,
wherein the layer containing the solid electrolyte A2 in the electrode material further contains a conductive assistant.

### Claim 12 (depends on 8)

The electrode for an all-solid-state battery according to claim 8,
wherein the molded body is formed on a current collector.

### Claim 13 (depends on 8)

The electrode for an all-solid-state battery according to claim 8,
wherein the electrode material includes a reaction suppressing layer for suppressing a reaction between the active material and the solid electrolyte on at least a portion of a surface of the active material.

### Claim 14 (depends on 8)

The electrode for an all-solid-state battery according to claim 8,
wherein the mixture molded body further contains a conductive assistant.

### Claim 15 (depends on 1)

An all-solid-state battery comprising:
a positive electrode;
a negative electrode; and
a solid electrolyte layer located between the positive electrode and the negative electrode,
wherein the electrode for an all-solid-state battery according to claim 1 is used as at least one of the positive electrode and the negative electrode.

### Claim 16 (depends on 8)

An all-solid-state battery comprising:
a positive electrode;
a negative electrode; and
a solid electrolyte layer located between the positive electrode and the negative electrode,
wherein the electrode for an all-solid-state battery according to claim 8 is used as at least one of the positive electrode and the negative electrode.