Carbon nanotube aggregate, conductive material, electrode, secondary battery, planar aggregate, laminate, filter, electromagnetic wave shield, and pellicle for extreme ultraviolet rays

Abstract

Provided is a carbon nanotube aggregate or the like which exhibits excellent conductivity when formed into a carbon nanotube dispersion and from which it is possible to obtain a carbon nanotube dispersion having a suitable viscosity.　The present invention pertains to: a carbon nanotube aggregate which satisfies conditions (1) and (2); and an application of the carbon nanotube aggregate. (1) The carbon nanotube aggregate contains Al atoms and has an Al atom content of 1000 ppm by mass or less with respect to the total mass of the carbon nanotube aggregate. (2) The cumulative 50% particle diameter D50 of the carbon nanotube aggregate in a volume-based particle size distribution is 1.0-15 µm.

Claims

1. A carbon nanotube aggregate that satisfies the following conditions (1) and (2): (1) It contains Al atoms, and the Al atom content is 1000 ppm by mass or less relative to the total mass of the carbon nanotube aggregate. (2) The cumulative 50% particle size D50 in the volume-based particle size distribution is 1.0 μm or more and 15 μm or less.

2. The carbon nanotube aggregate according to claim 1, satisfying the following condition (3): (3) comprising a bundle structure, wherein the area ratio of bundles with a bundle diameter of 100 nm or more in the area observed by a scanning electron microscope is greater than 0.

1.

3. A conductive material comprising the carbon nanotube aggregate described in claim 1 or 2.

4. An electrode comprising an electrode active material and the conductive material described in claim 3.

5. A secondary battery comprising the electrode described in claim 4.

6. A planar aggregate comprising the carbon nanotube aggregate described in claim 1 or 2.

7. A laminate comprising a substrate and the planar assembly described in claim 6.

8. A filter using the planar assembly described in claim 6.

9. An electromagnetic shield using the planar assembly described in claim 6.

10. A pellicle for extreme ultraviolet radiation using the planar aggregate described in claim 6.

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