# US 2021/0242444 A1 · Method for manufacturing all-solid-state battery

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- Number: US 2021/0242444 A1
- Document ID: US20210242444A1
- Status: Published application
- Kind: A1
- Application number: 17/269,716
- Filed: 2019-08-13
- Published: 2021-08-05
- Earliest claimed: 2018-08-21
- Assignees: Mtek-Smart Corporation
- Applicants: Mtek-Smart Corporation
- Inventors: Masafumi MATSUNAGA
- Web page: https://patentgrep.com/patent/US20210242444A1

## CPC

- H01M 4/0419: {involving spraying}
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/0409: {by a doctor blade method, slip-casting or roller coating}
- H01M 4/0411: {by extrusion}
- H01M 4/0414: {by screen printing}
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/624: {Electric conductive fillers}
- 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
- B05D 1/02: performed by spraying
- B05D 1/04: involving the use of an electrostatic field {(B05D1/025 and B05D1/14 take precedence)}
- B05D 1/06: Applying particulate materials
- B05D 1/12: Applying particulate materials (B05D1/06, B05D1/10 take precedence)
- B05D 5/12: to obtain a coating with specific electrical properties
- C23C 24/04: Impact or kinetic deposition of particles
- H01M 4/36: Selection of substances as active materials, active masses, active liquids
- H01M 4/38: of elements or alloys
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 4/5815: {Sulfides}
- H01M 4/587: for inserting or intercalating light metals
- H01M 10/0562: Solid materials
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- 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
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- 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

To lower electrical resistance by increasing the interfacial surface area and the adhesion between a current collector and an active material or an electrolyte, or between the active material and the electrolyte in an all-solid-state battery. In addition, to improve battery performance by eliminating or minimizing residual carbon originating from a binder. A slurry, composed of an electrode active material and a solvent, and a slurry, composed of electrolyte particles and a solvent, can be impacted against a target and thereby attached thereto to form a high-density layer and improve adhesion. Moreover, residual carbon is eliminated or minimized by eliminating or minimizing the content of binders, thereby improving battery performance.

## Claims

### Claim at position 1

1-7. (canceled)

### Claim 8

A method for manufacturing a storage battery, comprising applying and laminating different electrode slurries by independent heads in order to form an electrode on an object.

### Claim 9 (depends on 8)

The method of claim 8, wherein at least one of the different slurries is a slurry containing different particles.

### Claim 10 (depends on 8)

The method of claim 8, wherein the different slurries comprise a slurry containing mainly an active material or containing mainly an active material, and a slurry containing a conductive agent or containing mainly a conductive agent.

### Claim 11 (depends on 8)

The method of claim 8, wherein a base material is heated to between 30 and 150° C. when the slurries are applied.

### Claim 12 (depends on 8)

The method of claim 8, wherein the applying is performed by spraying or pulsed spraying.

### Claim 13 (depends on 11)

The method of claim 11, wherein at least one of the heads coverts the slurries filled into holes of a perforated cylindrical body or a perforated seamless belt that rotates in a direction of movement of the base material, or the slurries filled into a plurality of grooves formed in a rotatable wide roll to particles and apply the particles by compressed gas or liquefied gas.

### Claim 14 (depends on 11)

The method of claim 11, wherein at least one of the slurries is applied and laminated by the heads arranged in a direction of movement of the base material, and
the number of heads is the same as the number of layers of the slurry.

### Claim 15 (depends on 8)

The method of claim 8, wherein the storage battery is an all-solid-state battery, and
any of the different slurries contains active material particles, electrolyte particles, and a conductive agent.

### Claim 16 (depends on 11)

The method of claim 11, wherein the applying includes laminations by die coating, roll coating, screen coating, and curtain coating, and
only an interface with the base material is applied by spraying or the particle generator.

### Claim 17 (depends on 16)

The method of claim 16, wherein the applying in thin film is performed over and over by the spraying or the particle generator.