The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2023
Filed:
Mar. 29, 2018
Hydro-québec, Québec, CA;
Arkema France, Colombes, FR;
Ali Darwiche, Longueuil, CA;
Martin Dontigny, Varennes, CA;
Naoyuki Kondo, Québec, CA;
Abdelbast Guerfi, Québec, CA;
Karim Zaghib, Québec, CA;
Julien Beausoleil, Lescar, FR;
Alexander Korzhenko, Pau, FR;
HYDRO-QUEBEC, Montreal, CA;
ARKEMA FRANCE, Colombes, FR;
Abstract
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.