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:
Dec. 31, 2013
Filed:
May. 26, 2010
Kentaro Nakahara, Minato-ku, JP;
Shigeyuki Iwasa, Minato-ku, JP;
Masahiro Suguro, Minato-ku, JP;
Kazuaki Matsumoto, Minato-ku, JP;
Kaichiro Nakano, Minato-ku, JP;
Kentaro Nakahara, Minato-ku, JP;
Shigeyuki Iwasa, Minato-ku, JP;
Masahiro Suguro, Minato-ku, JP;
Kazuaki Matsumoto, Minato-ku, JP;
Kaichiro Nakano, Minato-ku, JP;
NEC Corporation, Tokyo, JP;
Abstract
There can be provided an energy storage device comprising a positive electrode comprising a nitroxyl compound having a nitroxyl cation partial structure in an oxidized state and having a nitroxyl radical partial structure in a reduced state; a negative electrode comprising a carbon material which lithium ions can be reversibly intercalated into and deintercalated from; and an electrolytic solution comprising a lithium salt and an aprotic organic solvent, wherein the negative electrode is a negative electrode comprising the carbon material which lithium ions are previously intercalated into, apart from lithium ions associated with a capacity A of lithium capable of being intercalated and deintercalated in charge and discharge, thereby allowing the energy storage device to simultaneously achieve high energy density, high output characteristics, low environmental load, and high stability in charge and discharge cycles.