# US 12,215,030 B2 · Carbonaceous material, method for producing same, electrode active material for electrochemical device, electrode for electrochemical device, and electrochemical device

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- Number: US 12,215,030 B2
- Document ID: US12215030B2
- Status: Granted
- Kind: B2
- Application number: 17/291,676
- Filed: 2019-11-07
- Published: 2022-01-06
- Granted: 2025-02-04
- Earliest claimed: 2018-11-09
- Assignees: Kuraray Co., Ltd.
- Applicants: Kuraray Co., Ltd.
- Inventors: Hiroyuki Nishinami; Yumika Nishita; Shushi Nishimura
- Web page: https://patentgrep.com/patent/US12215030B2

## CPC

- C01B 32/05: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
- C01B 32/336: characterised by gaseous activating agents
- C01B 32/324: from waste materials, e.g. tyres or spent sulfite pulp liquor
- H01G 11/24: characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
- H01G 11/34: characterised by carbonisation or activation of carbon
- H01G 11/44: Raw materials therefor, e.g. resins or coal
- C01P 2006/12: Surface area
- C01P 2006/40: Electric properties
- C01P 2006/80: Compositional purity
- Y02E 60/10: Energy storage using batteries
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- 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 invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g and a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m2.

## Claims

### Claim 1

A carbonaceous material having a BET specific surface area of 1550 to 2500 m2/g and a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m2.

### Claim 2 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has an electrical conductivity of 9 S/cm or less determined by powder resistance measurement at a load of 12 kN.

### Claim 3 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has a hydrogen content of 0.44 to 1.00% by mass.

### Claim 4 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has a value of an oxygen content/hydrogen content of 2.0 to 4.3.

### Claim 5 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material is based on a carbon precursor derived from a plant.

### Claim 6 (depends on 5)

The carbonaceous material according to claim 5, wherein the carbon precursor is derived from a coconut shell.

### Claim 7 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has an average pore size of 1.82 nm to 2.60 nm.

### Claim 8 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has a total pore volume of 0.75 cm3/g to 1.30 cm3/g.

### Claim 9 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has a hydrogen content of 0.44% by mass to 1.00% by mass.

### Claim 10 (depends on 1)

The carbonaceous material according to claim 1, wherein the carbonaceous material has an average particle diameter of 2 μm to 30 μm.

### Claim 11 (depends on 1)

An electrode active material, comprising:
the carbonaceous material of claim 1.

### Claim 12 (depends on 11)

An electrode, comprising:
the electrode active material to claim 11.

### Claim 13 (depends on 12)

An electrochemical device, comprising:
the electrode of claim 12.

### Claim 14

A method for producing a carbonaceous material, the method comprising:
heating a raw carbonaceous material to a first temperature of 330° C. or higher under a first oxidizing gas atmosphere;
washing the raw carbonaceous material with a washing liquid comprising an acid;
executing a deacidification process by heating the raw carbonaceous material to a second temperature of 330° C. or higher under a second oxidizing gas atmosphere; and
lowering a temperature of the raw carbonaceous material under a non-oxidizing gas atmosphere after the executing the deacidification process,
wherein the carbonaceous material has a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m2.

### Claim 15 (depends on 14)

The method according to claim 14, wherein the temperature of the raw carbonaceous material is lowered to 200° C. or lower in the lowering.

### Claim 16 (depends on 14)

The method according to claim 14, wherein the acid is present in a concentration of 0.1% to 3.0% based on a total amount of the washing liquid.

### Claim 17 (depends on 14)

The method according to claim 14, wherein the washing liquid has a temperature of 0° C. to 98° C.

### Claim 18 (depends on 14)

The method according to claim 14, wherein the first temperature is 700° C. to 1100° C.

### Claim 19 (depends on 14)

The method according to claim 14, wherein the second temperature is 500° C. to 1000° C.

### Claim 20 (depends on 14)

The method according to claim 14, wherein the non-oxidizing gas atmosphere includes at least one selected from the group consisting of a nitrogen gas, a hydrogen gas, an ammonia gas, an argon gas, a helium gas, a carbon monoxide gas and a hydrocarbon gas.