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:
Apr. 16, 2013
Filed:
Feb. 15, 2010
Shotaro Doi, Osaka, JP;
Atsuro Shirakami, Osaka, JP;
Kiyohiro Isii, Osaka, JP;
Susumu Nomoto, Kyoto, JP;
Hideki Shimamoto, Kyoto, JP;
Shotaro Doi, Osaka, JP;
Atsuro Shirakami, Osaka, JP;
Kiyohiro Isii, Osaka, JP;
Susumu Nomoto, Kyoto, JP;
Hideki Shimamoto, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention provides an electrolyte highly reliable in charge and discharge in a high voltage condition, and an electrochemical capacitor using the same. The electrolyte of the present invention includes a solvent, an electrolyte salt having an anion having a perfluoro alkyl group represented by a following composition formula, and an acid inducing substance having a fluorine atom for an anion, characterized in that the weight ratio of the acid inducing substance is in a range of 0.0001 to 2.0 wt %:()](wherein Q is a group 13 or group 15 element in the periodic table, Ris a perfluoro alkyl group (CF), n is a natural number, 1≦y<6, 1≦z<6, Mis a cation of Xth valence, and X is a natural number from 1 to 3). Thereby, since excessive electric potential decline of the negative electrode by the electrolyte salt and destruction of the negative electrode protection film by HF are restrained at the same time, deterioration of the cycle characteristics is restrained even in the case of charge and discharge in a high temperature or high voltage condition.