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. 25, 2019
Filed:
Jun. 13, 2016
Taiyo Yuden Co., Ltd., Taito-ku, Tokyo, JP;
Takeo Tsuzuki, Takasaki, JP;
Takatoshi Nagase, Takasaki, JP;
TAIYO YUDEN CO, LTD., Tokyo, JP;
Abstract
An electric double-layer capacitor contains an electrolytic solution, wherein the electrolytic solution comprises 1.2 to 1.8 mol/L of spirobipyrrolidinium tetrafluoroborate as electrolyte as well as solvent, where the solvent contains 50 to 60 percent by volume of propylene carbonate, 30 to 36 percent by volume of dimethyl carbonate, and 4 to 20 percent by volume of ethyl methyl carbonate. The electric double-layer capacitor can maintain its initial high capacitance and low internal resistance, while undergoing smaller characteristic changes after being exposed to low-temperature environments, high-voltage environments or high-temperature environments.