Carbon nanotube aggregate

Patent metadata

Field	Value
Publication number	US-11746017-B2
Application number	US-202117388246-A
Country	US
Kind code	B2
Filing date	Jul 29, 2021
Priority date	Jul 31, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A carbon nanotube aggregate includes a plurality of carbon nanotubes, a metal compound, and an oxide of the metal compound. The metal compound is contained in a space inside of each of the carbon nanotubes and/or in a space defined between the plurality of carbon nanotubes. When the metal compound is added inside the carbon nanotube aggregate, the metal compound is oxidized by reacting with oxygen or the like during or after a production process of the CNT aggregate, and the oxide is formed in the opening of the space to which the metal compound is added, so that the metal compound is capped with the oxide. Since the metal compound inside the CNT aggregate is shielded from the atmosphere, separation of the metal compound and reaction between the metal compound and oxygen and water in the atmosphere are suppressed, increasing heat resistance of the carbon nanotube aggregate.

First claim

What is claimed is:

1. A carbon nanotube aggregate comprising:
a plurality of carbon nanotubes;
a metal compound; and
a metal oxide including a metal of the metal compound,
wherein
the metal compound is contained in a space inside of each of the carbon nanotubes and in a space defined between the plurality of carbon nanotubes, and
the metal oxide is disposed at openings defined at both ends of the space containing the metal compound inside of each of the carbon nanotubes and at openings defined at both ends of the space containing the metal compound between the plurality of carbon nanotubes to cap the ends of the spaces in a longitudinal direction of the plurality of carbon nanotubes.

2. The carbon nanotube aggregate according to claim 1 , wherein the metal compound is made of a metal chloride.

3. The carbon nanotube aggregate according to claim 2 ,
wherein the metal chloride is molybdenum chloride, and
wherein the metal oxide is an oxide of molybdenum chloride or a partial oxide of molybdenum chloride.

4. The carbon nanotube aggregate according to claim 2 ,
wherein the metal chloride is iron chloride, and
wherein the metal oxide is an oxide of iron chloride or a partial oxide of iron chloride.

5. A carbon nanotube aggregate comprising:
a plurality of carbon nanotubes;
a metal compound; and
a metal oxide including a metal of the metal compound,
wherein the metal compound is contained in a space inside of each of the carbon nanotubes and/or in a space defined between the plurality of carbon nanotubes, and
wherein the carbon nanotube aggregate has a quadrangular pillar shape in which a length of one side is 10 μm or more or a columnar shape having a diameter of 10 μm or more.

6. A carbon nanotube aggregate comprising:
a plurality of carbon nanotubes;
a metal compound; and
a metal oxide including a metal of the metal compound,
wherein the metal compound is contained in a space inside of each of the carbon nanotubes and/or in a space defined between the plurality of carbon nanotubes, and
wherein a density of the plurality of carbon nanotubes is 0.8 g/cm3 or more.

Assignees

• Denso Corp

Inventors

• Naruse Jyunichi
• Inoue Arisa
• Yokoi Takanori
• Ishino Katsuma

Classifications

• C01B32/168 Primary

  After-treatment · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C01B2202/20

  Nanotubes characterized by their properties · CPC title

• C01P2004/13

  Nanotubes · CPC title