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:
Jan. 17, 2012
Filed:
Oct. 17, 2006
Nobuo Ando, Tokyo, JP;
Kenji Kojima, Tokyo, JP;
Shinichi Tasaki, Kanagawa, JP;
Hiromoto Taguchi, Kanagawa, JP;
Kohei Matsui, Hiroshima, JP;
Atsuro Shirakami, Tokyo, JP;
Yukinori Hato, Tokyo, JP;
Nobuo Ando, Tokyo, JP;
Kenji Kojima, Tokyo, JP;
Shinichi Tasaki, Kanagawa, JP;
Hiromoto Taguchi, Kanagawa, JP;
Kohei Matsui, Hiroshima, JP;
Atsuro Shirakami, Tokyo, JP;
Yukinori Hato, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A lithium ion capacitor includes a positive electrode made of a material capable of reversibly carrying either one or both of a lithium ion and an anion, a negative electrode made of a material capable of reversibly carrying a lithium ion, and an electrolytic solution made of a non-protonic organic solvent electrolytic solution of a lithium salt. A negative electrode active material is non-graphitizable carbon having a ratio of number of hydrogen atoms to number of carbon atoms of zero or more and less than 0.05. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a negative electrode potential when a cell is discharged to a voltage one half a charging voltage of the cell is 0.15 V or less relative to a lithium ion potential.