# US 2024/0204201 A1 · Current collector for anode-free all-solid-state battery and anode-free all-solid-state battery including the same

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- Number: US 2024/0204201 A1
- Document ID: US20240204201A1
- Status: Published application
- Kind: A1
- Application number: 18/235,056
- Filed: 2023-08-17
- Published: 2024-06-20
- Earliest claimed: 2022-12-19
- Assignees: Hyundai Motor Company; Kia Corporation; Korea University Research and Business Foundation
- Applicants: Hyundai Motor Company; Kia Corporation; Korea University Research and Business Foundation
- Inventors: Ga Hyeon Im; Hong Seok Min; Yun Sung Kim; Seung Ho Yu; Ji Hyun Lee; Beom Keun Cho; Hong Ju Lee
- Web page: https://patentgrep.com/patent/US20240204201A1

## CPC

- H01M 4/667: {in the form of layers, e.g. coatings}
- C23C 14/223: {specially adapted for coating particles}
- C23C 14/34: Sputtering
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/0426: {Sputtering}
- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 4/669: {Steels}
- H01M 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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

## Abstract

A current collector for an anode-free all-solid-state battery is capable of effectively increasing a physical contact area between an electrolyte and a current collector and effectively reducing interfacial voids between the electrolyte and the current collector. In addition, an anode-free all-solid-state battery capable of stably increasing cycle life without overvoltage is provided.

## Claims

### Claim 1

A current collector for an anode-free all-solid-state battery, comprising:
an anode current collector; and
a metal nanoparticle layer disposed on one surface of the anode current collector;
wherein the metal nanoparticle layer comprises a lithiophilic metal.

### Claim 2 (depends on 1)

The current collector of claim 1, wherein the lithiophilic metal is present in a shape of particles in the metal nanoparticle layer.

### Claim 3 (depends on 2)

The current collector of claim 2, wherein an average particle diameter (D50) of the lithiophilic metal is 50 to 200 nm.

### Claim 4 (depends on 1)

The current collector of claim 1, wherein a thickness of the metal nanoparticle layer is 100 to 1000 nm.

### Claim 5 (depends on 1)

The current collector of claim 1, wherein the lithiophilic metal comprises at least one of silver (Ag), magnesium (Mg), tin (Sn), bismuth (Bi), zinc (Zn), indium (In) or any combination thereof.

### Claim 6 (depends on 1)

The current collector of claim 1, wherein the anode current collector comprises at least one of nickel (Ni), copper (Cu), stainless steel (SUS) or any combination thereof.

### Claim 7 (depends on 1)

The current collector of claim 1, wherein the metal nanoparticle layer is formed through sputtering.

### Claim 8 (depends on 1)

An anode-free all-solid-state battery, comprising:
a cathode;
the current collector of claim 1; and
a solid electrolyte layer interposed between the cathode and the current collector;
wherein an average particle diameter (D50) of the lithiophilic metal in the metal nanoparticle layer is smaller than an average particle diameter (D50) of an electrolyte in the solid electrolyte layer.

### Claim 9

A method of manufacturing a current collector for an anode-free all-solid-state battery, comprising:
preparing an anode current collector; and
forming a metal nanoparticle layer by depositing a lithiophilic metal through sputtering on one surface of the anode current collector with a power of 20 to 50 W.

### Claim 10 (depends on 9)

The method of claim 9, wherein the metal nanoparticle layer is configured such that the lithiophilic metal is distributed in a form of particles.

### Claim 11 (depends on 10)

The method of claim 10, wherein an average particle diameter (D50) of the lithiophilic metal is 50 to 200 nm.

### Claim 12 (depends on 9)

The method of claim 9, wherein a thickness of the metal nanoparticle layer is 100 to 1000 nm.

### Claim 13 (depends on 9)

The method of claim 9, wherein the lithiophilic metal comprises at least one of silver (Ag), magnesium (Mg), tin (Sn), bismuth (Bi), zinc (Zn), indium (In) or any combination thereof.

### Claim 14 (depends on 9)

The method of claim 9, wherein the anode current collector comprises at least one of nickel (Ni), copper (Cu), stainless steel (SUS) or any combination thereof.