# US 12,218,355 B2 · Anode active material for all-solid-state battery

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- Number: US 12,218,355 B2
- Document ID: US12218355B2
- Status: Granted
- Kind: B2
- Application number: 18/664,564
- Filed: 2024-05-15
- Published: 2024-10-31
- Granted: 2025-02-04
- Earliest claimed: 2023-04-27
- Assignees: Hyundai Motor Company; Kia Corporation
- Applicants: Hyundai Motor Company; Kia Corporation
- Inventors: Yoon Kwang Lee; Yun Sung Kim; Ga Hyeon Im; Kyu Joon Lee; Hong Seok Min; Sang Heon Lee
- Web page: https://patentgrep.com/patent/US12218355B2

## CPC

- H01M 4/364: {as mixtures}
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/366: {as layered products}
- H01M 4/38: of elements or alloys
- H01M 4/386: {Silicon or alloys based on silicon}
- 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 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/027: {Negative electrodes}
- H01M 2300/0068: inorganic
- 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

Disclosed are an anode active material for an all-solid-state battery in which a lithophilic material is deposited inside and on particles.

## Claims

### Claim 1

An all-solid-state battery, comprising:
an anode active material; and
a solid electrolyte, and
wherein the anode active material comprises:
a particle comprising a plurality of flake carbon fragments overlapped in multiple layers;
a first material loaded in a space between the plurality of the flake carbon fragments and having lithiophilic property; and
a second material applied onto at least a portion of a surface of the particle and having lithiophilic property.

### Claim 2 (depends on 1)

The all-solid-state battery of claim 1, wherein the particle is formed in a spherical shape, an elliptical shape, or a rod shape.

### Claim 3 (depends on 1)

The all-solid-state battery of claim 1, wherein a shortest distance between one flake carbon fragment and the adjacent flake carbon fragment is about 10 nm to 100 nm.

### Claim 4 (depends on 1)

The all-solid-state battery of claim 1, wherein the first material occupies about 80% or greater of the space between the plurality of the flake carbon fragments.

### Claim 5 (depends on 1)

The all-solid-state battery of claim 1, wherein the first material comprises: one or more selected from the group consisting of silver (Ag), magnesium (Mg), aluminum (Al), gallium (Ga), zinc (Zn), bismuth (Bi), tin (Sn), indium (In), antimony (Sb), lead (Pb), silicon (Si), and germanium (Ge), or an alloy thereof with lithium.

### Claim 6 (depends on 1)

The all-solid-state battery of claim 1, wherein the first material comprises silicon (Si) or an alloy of silicon (Si) and lithium, and the first material is amorphous.

### Claim 7 (depends on 1)

The all-solid-state battery of claim 1, wherein the second material covers about 90% or greater of the surface of the particles.

### Claim 8 (depends on 1)

The all-solid-state battery of claim 1, wherein a thickness of the second material is about 20 nm to 1,000 nm.

### Claim 9 (depends on 1)

The all-solid-state battery of claim 1, wherein the second material comprises one or more selected from the group consisting of silver (Ag), magnesium (Mg), aluminum (Al), gallium (Ga), zinc (Zn), bismuth (Bi), tin (Sn), indium (In), antimony (Sb), lead (Pb), silicon (Si), and germanium (Ge), or an alloy thereof with lithium.

### Claim 10 (depends on 1)

The all-solid-state battery of claim 1, wherein the second material comprises silicon (Si) or an alloy of silicon (Si) and lithium, and the second material is amorphous.

### Claim 11 (depends on 1)

The all-solid-state battery of claim 1, wherein an average particle diameter (D50) of the anode active material is about 1 μm to 20 μm.

### Claim 12 (depends on 1)

The all-solid-state battery of claim 1, wherein the anode active material comprises an amount of about 40 wt % to 90 wt % of the particles and an amount of about 10 wt % to 60 wt % of a sum of the first material and the second material, the wt % is based on the total weight of the anode active material.

### Claim 13 (depends on 1)

The all-solid-state battery of claim 1, wherein a specific surface area of the anode active material is about 0.5 m2/g to 4 m2/g.

### Claim 14

An all-solid-state battery, comprising:
an anode active material; and
a solid electrolyte, and
wherein the anode active material comprises:
a secondary particle comprising a plurality of primary particles overlapped in multiple layers and spheroidized,
wherein each of the primary particles comprises a flake carbon fragment and a coating part applied onto a surface of the flake carbon fragment and comprising a lithiophilic material.

### Claim 15 (depends on 14)

The all-solid-state battery of claim 14, wherein a shortest distance between one flake carbon fragment and the adjacent flake carbon fragment is about 10 nm to 100 nm.

### Claim 16 (depends on 14)

The all-solid-state battery of claim 14, wherein the coating part comprises one or more selected from the group consisting of silver (Ag), magnesium (Mg), aluminum (Al), gallium (Ga), zinc (Zn), bismuth (Bi), tin (Sn), indium (In), antimony (Sb), lead (Pb), silicon (Si), and germanium (Ge), or an alloy thereof with lithium.

### Claim 17 (depends on 14)

The all-solid-state battery of claim 14, wherein the coating part covers about 90% or greater of the surface of the flake carbon fragment.

### Claim 18 (depends on 14)

The all-solid-state battery of claim 14, wherein a thickness of the coating part is about 20 nm to 1,000 nm.

### Claim 19 (depends on 14)

The all-solid-state battery of claim 14, wherein the anode active material comprises an amount of about 40 wt % to 90 wt % of the plurality of the flake carbon fragments and an amount of about 10 wt % to 60 wt % of the coating part, the wt % is based on the total weight of the anode active material.

### Claim 20 (depends on 14)

The all-solid-state battery of claim 14, wherein a specific surface area of the anode active material is about 0.5 m2/g to 4 m2/g.