# US 11,305,996 B2 · Carbon sheet

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

- Number: US 11,305,996 B2
- Document ID: US11305996B2
- Status: Granted
- Kind: B2
- Application number: 16/647,872
- Filed: 2018-09-27
- Published: 2020-09-03
- Granted: 2022-04-19
- Earliest claimed: 2017-09-28
- Assignees: Zeon Corporation
- Applicants: Zeon Corporation
- Inventors: Tomoko Yamagishi; Mitsugu Uejima
- Web page: https://patentgrep.com/patent/US11305996B2

## CPC

- C01B 32/159: single-walled
- C01B 32/174: Derivatisation; Solubilisation; Dispersion in solvents
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- C01B 2202/02: Single-walled nanotubes
- C01P 2006/12: Surface area
- Y02E 60/50: Fuel cells
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- 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

Provided is a material that has excellent handleability and processability, and that when used as a support for a different material, enables support of the different material up to an inner part thereof. A carbon sheet contains one or more carbon nanotubes and has a porosity of not less than 5% and not more than 90%. The carbon sheet preferably includes: a porous substrate made from carbon; and the carbon nanotubes, attached to the porous substrate. The carbon nanotubes contained in the carbon sheet are preferably single-walled carbon nanotubes. Moreover, the carbon nanotubes contained in the carbon sheet preferably have a nitrogen adsorption specific surface area of 600 m2/g or more.

## Claims

### Claim 1

A carbon sheet comprising one or more carbon nanotubes and having a porosity of not less than 5% and not more than 90%, wherein
the carbon sheet further comprises a porous substrate made from carbon, and
the carbon nanotubes are attached to the porous substrate.

### Claim 2 (depends on 1)

The carbon sheet according to claim 1, wherein the carbon nanotubes are single-walled carbon nanotubes.

### Claim 3 (depends on 1)

The carbon sheet according to claim 1, wherein the carbon nanotubes have a nitrogen adsorption specific surface area of 600 m2/g or more.

### Claim 4 (depends on 1)

The carbon sheet according to claim 1, composed of only the carbon nanotubes.