AQUEOUS DISPERSION OF MULTILAYERED CARBON NANOTUBES

摘要

An aqueous dispersion of multilayered carbon nanotubes (CNTs), said aqueous dispersion containing multilayered CNTs having an average outer fiber diameter within a range of of 50-110 nm and carboxymethylcellulose sodium (CMCNa), characterized by: having a viscosity (at 25°C) of 100 mPa·s or lower; the content of the multilayered CNTs being within a range of 3-20 mass%; the mass ratio of CMCNa to the multilayered CNTs being within a range of 0.1-0.2; the median diameter (d50), on the volume basis, of aggregated particles that remain in the aqueous dispersion being within a range of 0.3-0.6μm; and the span value (A) [(d90-d50)/d50] thereof being within a range of 0.9-1.2. This aqueous dispersion of multilayered CNTs is appropriately usable in the formation of an electrode film, in particular, an LIB electrode film. In this aqueous dispersion, even multilayered CNTs having an extremely strong aggregation force are dispersed at a high concentration and in a stable state.