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:
Oct. 16, 2007
Filed:
Sep. 25, 2006
Hiroshi Yoshida, Chiba, JP;
Hidenori Nakata, Chiba, JP;
Hiroshi Yoshida, Chiba, JP;
Hidenori Nakata, Chiba, JP;
Nisshinbo Industries, Inc., Tokyo, JP;
Abstract
An electric double layer capacitor has a pair of current collectors, a positive polarizable electrode which is provided on one of the pair of current collectors, includes activated carbon of a weight Wand has a capacitance C, a negative polarizable electrode which is provided on the other of the pair of current collectors, includes activated carbon of a weight Wand has a capacitance C, a separator interposed between the positive and negative polarizable electrodes, and an organic electrolytic solution which impregnates at least the positive and negative polarizable electrodes and the separator, wherein C/C=0.6 to 1.0 and W/W=1.1 to 2.0. Even when continuously charged at a high applied voltage, the electric double layer capacitor has a high retention of capacitance and a low rise in internal resistance, and thus has an excellent durability.