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. 19, 2012
Filed:
Dec. 07, 2006
Kohei Matsui, Hiroshima, JP;
Atsuro Shirakami, Tokyo, JP;
Nobuo Ando, Tokyo, JP;
Shinichi Tasaki, Yokohama, JP;
Risa Miyagawa, Tokyo, JP;
Osamu Hatozaki, Tokyo, JP;
Yukinori Hato, Tokyo, JP;
Kohei Matsui, Hiroshima, JP;
Atsuro Shirakami, Tokyo, JP;
Nobuo Ando, Tokyo, JP;
Shinichi Tasaki, Yokohama, JP;
Risa Miyagawa, Tokyo, JP;
Osamu Hatozaki, Tokyo, JP;
Yukinori Hato, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A lithium ion capacitor includes a positive electrode, a negative electrode, and a non-protonic organic solvent electrolytic solution of a lithium salt. A positive electrode active material is a material capable of reversibly doping a lithium ion and/or an anion. A negative electrode active material is a material capable of reversibly doping a lithium ion. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a positive electrode potential after the positive electrode and the negative electrode are short-circuited is 2.0 V (relative to Li/Li) or less when capacitance per unit weight of the positive electrode is C(F/g), weight of the positive electrode active material is W(g), capacitance per unit weight of negative electrode is C(F/g), and weight of the negative electrode active material is W(g), a value of (C×W)/(C×W) is 5 or more.