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:
Sep. 30, 2014
Filed:
Feb. 09, 2007
Ick Jun Kim, Busan, KR;
Sun Hye Yang, Gyeongsangnam-do, KR;
Seong IN Moon, Gyeongsangnam-do, KR;
Hyun Soo Kim, Gyeongsangnam-do, KR;
Min Jae Jeon, Busan, KR;
Ick Jun Kim, Busan, KR;
Sun Hye Yang, Gyeongsangnam-do, KR;
Seong In Moon, Gyeongsangnam-do, KR;
Hyun Soo Kim, Gyeongsangnam-do, KR;
Min Jae Jeon, Busan, KR;
Korea Electrotechnology Research Institution, Changwon-Si, Gyeongsangnam-Do, KR;
Abstract
An active material of the present invention has fine pores formed in the interlayer of a carbon material capable of exhibiting electrochemical double layer capacitance. The fine pores are formed by forming an oxidized graphite structure combined with oxygen in the interlayer of a part or whole of the carbon material containing soft carbon and then removing a part or whole of oxygen in the interlayer. A method for producing an energy storage active material for use in an electrochemical double layer capacitor comprises pre-treating a carbon material through heat treatment and oxidizing the pre-treated carbon material using an oxidant. The method further comprises reducing the oxidized carbon material through heat treatment. The interlayer distances of an active material for respective steps, measured by a powder X-ray diffraction method, are 0.33˜0.36 nm in the pre-treatment step, 0.5˜2.1 nm in the oxidation step, and 0.34˜0.5 nm in the reduction step.