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:
Mar. 04, 2014
Filed:
Sep. 11, 2009
Masaki Fujii, Kawasaki, JP;
Shinya Taguchi, Kawasaki, JP;
Yutaka Sanokawa, Kawasaki, JP;
Keizo Ikai, Kawasaki, JP;
Masaki Fujii, Kawasaki, JP;
Shinya Taguchi, Kawasaki, JP;
Yutaka Sanokawa, Kawasaki, JP;
Keizo Ikai, Kawasaki, JP;
JX Nippon Oil & Energy Corporation, Tokyo, JP;
Abstract
The present invention provides a process for producing an activated carbon having a small average particle diameter, a uniform particle size and a relatively large specific surface area suitable for an electric double layer capacitor electrode, in an easy and cost effective manner. The process comprises calcining an easily graphitizable carbon material such as petroleum coke or coal coke, used as the raw material under an oxidizing gas atmosphere, adjusting the particle size of the carbon material, and then activating the carbon material. The use of the activated carbon produced by the process of the present invention in an electrode can provide an electric double layer capacitor having a large capacitance per unit volume.