Mehrwandiges Kohlenstoffnanoröhrchenpulver sowie Dispersionslösung aus Leitfähigem Material und Lithiumsekundärbatterie damit

Details

Veröffentlichungs-Nr.

EP4763803

Anmeldetag

10. Oktober 2024

Veröffentlichung

17. April 2025

Rechtsraum

EP

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 (D_max) 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.

Anmelder

Firma

LG Energy Solution, Ltd.

Land

🇰🇷 Südkorea