Multi Walled Carbon Nanotube Powder, And Conductive Material Dispersion Solution And Lithium Secondary Battery, Which Comprise Same

Abstract: The present invention relates to a multi-walled carbon nanotube powder, a conductive material dispersion solution comprising the carbon nanotube powder, and a lithium secondary battery comprising the carbon nanotube powder. The multi-walled carbon nanotube powder, in a dry powder state, has, in a particle size distribution (PSD) measured by a particle size analyzer, a volume cumulative 50% average particle diameter (D50) of 10-20 µm, a volume cumulative 90% average particle diameter (D90) of 20-40 µm and a maximum particle diameter (Dmax) of 45-70 µm, and contains 1.0-3.0 atom% of oxygen atoms, measured by XPS analysis, the particle size characteristics thereof in a powder state are controlled such that excellent dispersibility can be exhibited in an actual electrode, thereby enabling the viscosity of a dispersion solution to be lowered, and uniform dispersion thereof in an electrode is possible such that the resistance characteristics and lifespan characteristics of a lithium secondary battery can be improved.

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