# US 2019/0375641 A1 · Carbonaceous material and method for producing same

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- Number: US 2019/0375641 A1
- Document ID: US20190375641A1
- Status: Published application
- Kind: A1
- Application number: 16/488,862
- Filed: 2018-02-23
- Published: 2019-12-12
- Earliest claimed: 2017-02-27
- Assignees: Kuraray Co., Ltd.
- Applicants: Kuraray Co., Ltd.
- Inventors: Shohei KOBAYASHI; Motomi MATSUSHIMA; Taketoshi OKUNO; Hideharu IWASAKI
- Web page: https://patentgrep.com/patent/US20190375641A1

## CPC

- C01B 32/312: Preparation
- C01B 32/318: characterised by the starting materials
- C01B 32/30: Active carbon
- C01B 32/336: characterised by gaseous activating agents
- C01B 32/348: Metallic compounds
- C01B 32/354: After-treatment
- H01G 11/42: Powders or particles, e.g. composition thereof
- H01G 11/44: Raw materials therefor, e.g. resins or coal
- C01P 2004/60: Particles characterised by their size
- C01P 2006/12: Surface area
- C01P 2006/80: Compositional purity
- H01G 11/34: characterised by carbonisation or activation of carbon
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- 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
- 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

The present invention relates to a carbonaceous material which is derived from a plant, having a specific surface area of 1800 to 3000 m2/g as measured by a BET method, a hydrogen element content of 0.42% by mass or less and an oxygen element content of 1.5% by mass or less.

## Claims

### Claim 1

A carbonaceous material which is derived from a plant, the carbonaceous material having a specific surface area of 1800 to 3000 m2/g as measured by a BET method, a hydrogen element content of 0.42% by mass or less and an oxygen element content of 1.5% by mass or less.

### Claim 2 (depends on 1)

The carbonaceous material according to claim 1, wherein a potassium element content is 500 ppm or less.

### Claim 3 (depends on 1)

The carbonaceous material according to claim 1, wherein an iron element content is 200 ppm or less.

### Claim 4 (depends on 1)

A method for producing the carbonaceous material according to claim 1, the method comprising:
heat-treating plant-derived activated carbon which has an average particle diameter of 100 to 10000 μm and a specific surface area of 1600 to 3000 m2/g as measured by a BET method, in an inert gas atmosphere comprising a halogen compound at 500 to 1250° C. to produce the carbonaceous material.

### Claim 5 (depends on 1)

A method for producing the carbonaceous material according to claim 1, the method comprising:
attaching an alkali metal hydroxide onto plant-derived activated carbon having an average particle diameter of 100 to 10000 μm and a specific surface area of 1600 to 3000 m2/g as measured by a BET method; and
heat-treating alkali metal hydroxide-attached activated carbon produced in the attaching at 500 to 1250° C. in an inert gas atmosphere comprising a halogen compound to produce the carbonaceous material.