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:
Nov. 03, 2020
Filed:
Mar. 22, 2019
Applicant:
Industry-academia Cooperation Group of Sejong University, Seoul, KR;
Inventors:
Nae Sung Lee, Seoul, KR;
Tae Hun Shin, Goyang-si, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 32/16 (2017.01);
U.S. Cl.
CPC ...
C01B 32/16 (2017.08); C01B 2202/20 (2013.01);
Abstract
Disclosed is a method for producing CNTs by an electric arc discharge method. The synthesis gas for the arc discharge includes nitrogen and oxygen gases. The oxygen gas in the synthesis gas is converted to reactive oxygen species by the arc discharge and chemically reacts with amorphous carbon. Accordingly, the formation of amorphous carbon is suppressed when CNTs are formed on the cathode, and thus, high crystallinity of CNTs can be secured.