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:
Feb. 28, 2012
Filed:
Mar. 10, 2006
Xianming Wang, Tsukuba, JP;
Yoshitsugu Sone, Tsukuba, JP;
Saburo Kuwajima, Tsukuba, JP;
Kenichi Kuwajima, Kanagawa, JP;
Xianming Wang, Tsukuba, JP;
Yoshitsugu Sone, Tsukuba, JP;
Saburo Kuwajima, Tsukuba, JP;
Kenichi Kuwajima, Kanagawa, JP;
Japan Aerospace Exploration Agency, Tokyo, JP;
Abstract
Disclosed are an additive for improving charge/discharge characteristics of a lithium-ion cell, a nonaqueous electrolytic solution containing the additive, and a lithium-ion cell using the additive and/or the nonaqueous electrolytic solution. The additive serves as a solvent for a fluorine resin, such as poly(vinylidene fluoride), which is incorporated as an adhesive in a positive electrode containing a lithium-transition metal oxide capable of absorbing and releasing lithium and a negative electrode containing a carbon material capable of absorbing and releasing lithium. The additive comprises three compounds selected, respectively, from a 2-pyrrolidinone compound group, a cyclic alkyl compound group, and a cyclic pentanone compound group.