Carbon nanotube aggregates, conductive materials, electrodes, secondary batteries, planar aggregates, laminates, filters, electromagnetic shielding, and pellicles for extreme ultraviolet radiation.

Abstract

The present invention provides carbon nanotube aggregates and the like that exhibit excellent conductivity when used as a carbon nanotube dispersion, and that yield a carbon nanotube dispersion with appropriate viscosity. [Solution] A carbon nanotube aggregate and its application that satisfies the following conditions (1) and (2): (1) It contains Na atoms, and the Na atom content is less than 200 ppm by mass relative to the total mass of the carbon nanotube aggregate. (2) The elongation at break measured by the following measurement method is greater than 0% and 3.0% or less. The method for measuring the elongation at break involves preparing a dispersion containing the carbon nanotube aggregate, pouring the obtained dispersion onto a plate, heating and drying it at 100°C, and performing a tensile test on the resulting sample using a tensile testing device. The point where the stress is maximum is considered the breaking point, and the elongation at break is calculated from the length of the sample at the breaking point and the length of the sample before measurement.

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