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:
Jan. 28, 2020
Filed:
Oct. 26, 2016
Korea Institute of Carbon Convergence Technology, Jeonju-si, Jeollabuk-do, KR;
Byungjoo Kim, Jeongeup-si, KR;
Hyemin Lee, Jeonju-si, KR;
KOREA INSTITUTE OF CARBON CONVERGENCE TECHNOLOGY, Jeongju-si, KR;
Abstract
A method of preparing a hard carbon-based electrode active material having high specific surface area by carbonization process control, comprises charging polyurethane into a high temperature furnace, supplying oxygen gas to the high temperature furnace and oxidizing the polyurethane under an oxygen atmosphere, supplying a nitrogen gas to the high temperature furnace and heating to carbonize a stabilized polyurethane under a nitrogen atmosphere, thereby producing a hard carbon, heating the hard carbon under a nitrogen atmosphere and supplying steam to activate the hard carbon under a steam atmosphere, thereby producing an active carbon, supplying hydrogen and reducing the active carbon under a hydrogen atmosphere, and cooling the active carbon under a nitrogen atmosphere.