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:
Jun. 24, 2008
Filed:
May. 17, 2006
Takeshi Fujino, Wako, JP;
Byoungju Lee, Wako, JP;
Masayuki Takeda, Yokkaichi, JP;
Hideo Nagaoka, Yokkaichi, JP;
Hiroo Miyauchi, Yokkaichi, JP;
Daisuke Noda, Yokkaichi, JP;
Takeshi Fujino, Wako, JP;
Byoungju Lee, Wako, JP;
Masayuki Takeda, Yokkaichi, JP;
Hideo Nagaoka, Yokkaichi, JP;
Hiroo Miyauchi, Yokkaichi, JP;
Daisuke Noda, Yokkaichi, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
In an electric double layer capacitor and electrolytic solution, decomposition of at least one of an open-chain carbonate and a cyclic carbonate can be controlled under high temperature conditions, initial performance and maintained ratio of capacitance are superior, and energy density is high, when graphitized alkali-activated carbon is used as an electrode material and at least one of an open-chain carbonate and a cyclic carbonate is used in an organic electrolytic solution. The electric double layer capacitor includes electrodes containing alkali-activated carbon including graphitized carbon material, and an organic electrolytic solution in which a supporting salt is dissolved in solvent including aromatic carboxylate and at least one of an open-chain carbonate and a cyclic carbonate, in which the content of the aromatic carboxylate is not more than 50 weight % relative to the total weight of the solvent.