# US 12,119,486 B2 · Anode material and electrochemical device and electronic device including the same

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- Number: US 12,119,486 B2
- Document ID: US12119486B2
- Status: Granted
- Kind: B2
- Application number: 17/362,581
- Filed: 2021-06-29
- Published: 2021-10-21
- Granted: 2024-10-15
- Earliest claimed: 2019-08-07
- Assignees: Ningde Amperex Technology Limited
- Applicants: Ningde Amperex Technology Limited
- Inventors: ChengBo Zhang; Ting Yi; Hang Cui; Yuansen Xie
- Web page: https://patentgrep.com/patent/US12119486B2

## CPC

- H01M 4/48: of inorganic oxides or hydroxides
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/366: {as layered products}
- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2004/027: {Negative electrodes}
- 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 anode material includes a lithiated silicon oxide material and a MySiOz layer. The lithiated silicon oxide material includes Li2SiO3, Li2Si2O5 or a combination thereof, and the MySiOz layer coats the lithiated silicon oxide material; M includes Mg, Al, Zn, Ca, Ba, B or any combination thereof; and 0<y<3, and 0.5<z<6. The anode material has high first discharge coulombic efficiency, high gram capacity, and good cycle performance.

## Claims

### Claim 1

An anode material, comprising: a lithiated silicon oxide material and a MySiOz layer,
wherein the lithiated silicon oxide material includes Li2SiO3, Li2Si2O5 or a combination thereof, and the MySiOz layer is coated on the lithiated silicon oxide material;
M comprises B; and
0<y<3, and 0.5<z<6;
wherein a weight percentage of the M element is 10 wt % to 30 wt %, based on a total weight of the anode material.

### Claim 2 (depends on 1)

The anode material according to claim 1, wherein the MySiOz layer further comprises Mg2SiO4, Al2SiO5, Zn2SiO4, CaSiO3, BaSiO3, or any combination thereof.

### Claim 3 (depends on 1)

The anode material according to claim 1, wherein a thickness of the MySiOz layer is 0.2 μm to 3 μm.

### Claim 4 (depends on 1)

The anode material according to claim 1, further comprising a carbon layer coating on at least a portion of the MySiOz layer.

### Claim 5 (depends on 4)

The anode material according to claim 4, wherein a thickness of the carbon layer is 1 nm to 500 nm.

### Claim 6 (depends on 1)

The anode material according to claim 1, wherein a weight percentage of the Li element is 2 wt % to 20 wt %, based on a total weight of the anode material.

### Claim 7 (depends on 1)

The anode material according to claim 1, wherein a ratio of a weight percentage of the Li element to that of the Si element is 3 to 30.

### Claim 8 (depends on 1)

The anode material according to claim 1, wherein a ratio of a weight percentage of the M element to that of the Si element is 5-60.

### Claim 9 (depends on 1)

The anode material according to claim 1, wherein the anode material includes nanometer Si grains.

### Claim 10

A method for preparing an anode material, comprising:
(1) mixing a M source with a silicon oxide SiOx to form a mixed material;
carrying out a high-temperature treatment on the mixed material at 800-1300° C. for 1-5 h;
grinding the material subjected to the high-temperature treatment to obtain a grinded material; and
(2) mixing the grinded material with a Li source;
carrying out high-temperature treatment at 500-800° C. for 1-5 h;
wherein 0.5<x<2; and
M comprises B.

### Claim 11

An anode comprising an anode material, wherein the anode material comprises a lithiated silicon oxide material and a MySiOz layer, wherein
the lithiated silicon oxide material includes Li2SiO3, Li2Si2O5 or a combination thereof, and the MySiOz layer is coated on the lithiated silicon oxide material;
M comprises B; and 0<y<3, and 0.5<z<6;
wherein a weight percentage of the M element is 10 wt % to 30 wt %, based on a total weight of the anode material.

### Claim 12 (depends on 11)

The anode according to claim 11, wherein the MySiOz layer further comprises Mg2SiO4, Al2SiO5, Zn2SiO4, CaSiO3, BaSiO3, or any combination thereof.

### Claim 13 (depends on 11)

The anode according to claim 11, wherein a thickness of the MySiOz layer is 0.2 μm to 3 μm.

### Claim 14 (depends on 11)

The anode according to claim 11, further comprising a carbon layer coating on at least a portion of the MySiOz layer.

### Claim 15 (depends on 14)

The anode according to claim 14, wherein a thickness of the carbon layer is 1 nm to 500 nm.

### Claim 16 (depends on 11)

The anode according to claim 11, wherein a weight percentage of the Li element is 2 wt % to 20 wt %, based on a total weight of the anode material.

### Claim 17 (depends on 11)

The anode according to claim 11, wherein a ratio of a weight percentage of the Li element to that of the Si element is 3 to 30.

### Claim 18 (depends on 11)

The anode according to claim 11, wherein a ratio of a weight percentage of the M element to that of the Si element is 5-60.