Arkema France

Hydro-quebec

Centre National De La Recherche Scientifique

Arianegroup Sas

Ali Darwiche

Karim Zaghib

Abdelbast Guerfi

Alexander Korzhenko

Martin Dontigny

Hélène Blanchard

Joël A Renouard

Julien Beausoleil

Naoyuki Kondo

Raphaël L Janot

The present invention proposes a process for purifying raw carbon nanotubes to obtain an content in metallic impurities comprised between 5 ppm and 200 ppm. The process includes an increase in the bulk density of the raw carbon nanotubes via compacting to produce compacted carbon nanotubes. The process further includes sintering the compacted carbon nanotubes by undergoing thermal treatment under gaseous atmosphere in order to remove at least a portion of the metallic impurities contained in the raw carbon nanotubes, and consequently producing purified carbon nanotubes. These purified carbon nanotubes are directly usable as electronic conductors serving as basis additive to an electrode material without requiring any subsequent purification step. The electrode material can then be used to manufacture an electrode destined to a lithium-ion battery.

Method for the purification of raw carbon nanotubes

Growing community of inventors

Longueuil, Canada

Ali Darwiche