# US 2025/0096267 A1 · Carbonaceous material and preparation method therefor, and secondary battery and electrical device comprising same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2025/0096267 A1
- Document ID: US20250096267A1
- Status: Published application
- Kind: A1
- Application number: 18/963,505
- Filed: 2024-11-28
- Published: 2025-03-20
- Earliest claimed: 2022-10-21
- Assignees: Contemporary Amperex Technology (Hong Kong) Limited
- Applicants: Contemporary Amperex Technology (Hong Kong) Limited
- Inventors: Xiaoxia Chen; Xinxin Zhang; Yu Ma; Chuying Ouyang; Xiaoji Zheng; Xiaolong Li; Wenguang Lin; Shangdong Chen
- Web page: https://patentgrep.com/patent/US20250096267A1

## CPC

- H01M 4/587: for inserting or intercalating light metals
- C01B 32/05: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/78: by stacking-plane distances or stacking sequences
- C01P 2002/82: by IR- or Raman-data
- C01P 2004/03: obtained by SEM
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2006/10: Solid density
- C01P 2006/11: Powder tap density
- C01P 2006/12: Surface area
- C01P 2006/16: Pore diameter
- C01P 2006/40: Electric properties
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present application provides a carbonaceous material and a preparation method therefor, and a secondary battery and an electrical device comprising the same. The carbonaceous material has 0.13≤A/B≤0.50, wherein A represents a mass of water vapor adsorbed on the carbonaceous material after a water vapor adsorption test by placing the carbonaceous material under constant temperature and humidity conditions of 25° C. and 100% RH for 100 h, and B represents an initial mass of the carbonaceous material. The present application can simultaneously improve the capacity and initial coulombic efficiency of the carbonaceous material.

## Claims

### Claim 1

A carbonaceous material, having 0.13≤A/B≤0.50, wherein A represents a mass of water vapor adsorbed on the carbonaceous material after a water vapor adsorption test by placing the carbonaceous material under constant temperature and humidity conditions of 25° C. and 100% RH for 100 h, and B represents an initial mass of the carbonaceous material.

### Claim 2 (depends on 1)

The carbonaceous material according to claim 1, wherein 0.15≤A/B≤0.50, and optionally 0.30≤A/B≤0.496.

### Claim 3 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has a true density p of 1.0 g/cm3 to 1.6 g/cm3, and optionally 1.05 g/cm3 to 1.45 g/cm3.

### Claim 4 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material comprises a plurality of nano pore structures, and optionally, the carbonaceous material comprises a plurality of pore structures having a pore size of 10 nm or less.

### Claim 5 (depends on 1)

The carbonaceous material according to claim 1, wherein
in Raman spectra of the carbonaceous material, Id/Ig is 1.0 to 1.3, and optionally 1.05 to 1.15, wherein Id represents a d-peak intensity of Raman shift within a range of 1350+50 cm−1, and Ig represents a g-peak intensity of Raman shift within a range of 1580=50 cm−1; and/or
an interlayer spacing of a (002) crystal plane of the carbonaceous material is ≥0.37 nm, and optionally 0.37 nm to 0.42 nm; and/or
in X-ray diffraction spectra of the carbonaceous material, a 20 value corresponding to a (002) crystal plane peak is 22° to 24°.

### Claim 6 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material satisfies at least one of the following conditions (1) to (5):
(1) the carbonaceous material has a volume particle size Dv50 of 3 μm to 7 μm, and optionally 4 μm to 6 μm;
(2) the carbonaceous material has a volume particle size Dv90 of 8 μm to 15 μm, and optionally 9 μm to 12 μm;
(3) the carbonaceous material has a specific surface area of 0.1 m2/g to 10 m2/g, and optionally 1 m2/g to 5 m2/g;
(4) the carbonaceous material has a powder compaction density of 0.90 g/cm3 to 1.05 g/cm3 under a force of 50000 N, and optionally 0.93 g/cm3 to 1.02 g/cm3; and
(5) the carbonaceous material has a tap density of 0.80 g/cm3 to 0.95 g/cm3, and optionally 0.85 g/cm3 to 0.90 g/cm3.

### Claim 7

A method for preparing a carbonaceous material, comprising the following steps:
S10, providing a raw material which is an organic carbon source;
S20, crushing the raw material to a required particle size;
S30, washing and removing impurities, performed by washing the crushed raw material obtained in S20 to remove impurities, wherein the washing and removing impurities process comprises at least an acidic solution washing step and an alkaline solution washing step; and
S40, carbonizing, performed by placing, in a furnace, the raw material obtained in S30 after washing and removing impurities, introducing a protective gas containing hydrogen, controlling furnace pressure to ≤−2 kPa relative to standard pressure, then heating at a rate of ≤1° C./min to a target temperature T1, and maintaining the target temperature T1 for a target time t1 to obtain a carbonaceous material, wherein the carbonaceous material has 0.13≤A/B≤0.50, wherein A represents a mass of water vapor adsorbed on the carbonaceous material after a water vapor adsorption test by placing the carbonaceous material under constant temperature and humidity conditions of 25° C. and 100% RH for 100 h, and B represents an initial mass of the carbonaceous material.

### Claim 8 (depends on 7)

The method according to claim 7, wherein in S20, the crushing comprises ball milling or airflow milling crushing.

### Claim 9 (depends on 7)

The method according to claim 7, wherein
in S30, the washing and removing impurities process comprises the following steps in order: acidic solution washing, water washing, alkaline solution washing, water washing, and drying; or
in S30, the washing and removing impurities process comprises the following steps in order: washing by an alkaline solution, washing by water, washing by an acidic solution, washing by water, and drying.

### Claim 10 (depends on 7)

The method according to claim 7, wherein in S30, the acidic solution satisfies at least one of the following conditions (1) to (4):
(1) a H+ concentration of the acidic solution is 0.1 mol/L to 6 mol/L, and optionally 1 mol/L to 6 mol/L;
(2) washing temperature of the acidic solution is 10° C. to 95° C., and optionally 30° C. to 95° C.;
(3) washing time of the acidic solution is 1 h to 24 h, and optionally 10 h to 24 h; and
(4) a solute of the acidic solution comprises one or more of hydrochloric acid, nitric acid, sulfuric acid, and perchloric acid, and a solvent the acidic solution comprises water.

### Claim 11 (depends on 7)

The method according to claim 7, wherein in S30, the alkaline solution satisfies at least one of the following conditions (1) to (4):
(1) a OH concentration of the alkaline solution is 0.1 mol/L to 6 mol/L, and optionally 1 mol/L to 6 mol/L;
(2) washing temperature of the alkaline solution is 10° C. to 95° C., and optionally 30° C. to 95° C.;
(3) washing time of the alkaline solution is 1 h to 24 h, and optionally 10 h to 24 h; and
(4) a solute of the alkaline solution comprises NaOH, KOH, or a combination thereof, and a solvent of the alkaline solution comprises water.

### Claim 12 (depends on 7)

The method according to claim 7, wherein
in S40, the temperature T1 is 1000° C. to 1600° C., and optionally 1150° C. to 1500° C.; and/or
in S40, the time t1 is ≥1 h, and optionally 10 h to 24 h; and/or
in S40, heating rate is 0.05° C./min to 1° C./min, and optionally 0.1° C./min to 1° C./min; and/or
in S40, the protective gas comprises a mixture of hydrogen and inert gas, and the hydrogen has a volume concentration of greater than 0 and less than or equal to 5%, and optionally 1% to 5%; and/or
in S40, the furnace pressure is −5 kPa to −2 kPa, and optionally −5 kPa to −3 kPa.

### Claim 13 (depends on 7)

The method according to claim 7, wherein in S10, the organic carbon source comprises one or more of biomass materials and thermoplastic resin materials;
optionally, the biomass materials comprise one or more of energy crops and biomass wastes; and
optionally, the thermoplastic resin materials comprise one or more of phenolic resin, acrylic resin, polyvinyl chloride, polycarbonate, epoxy resin, paraformaldehyde, coumarone resin, and petroleum resin.

### Claim 14 (depends on 1)

A secondary battery, comprising a negative electrode plate, the negative electrode plate comprising the carbonaceous material according to claim 1.

### Claim 15 (depends on 14)

An electrical device, comprising the secondary battery according to claim 14.