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:
Aug. 13, 2002
Filed:
Nov. 22, 2000
Kimiyo Hata, Chiba, JP;
Takaya Sato, Chiba, JP;
Nisshinbo Industries, Inc., Tokyo, JP;
Abstract
An electrolyte composition and a solid polymer electrolyte for electric double-layer capacitors are each composed of a polyurethane polymeric compound and an ion-conductive salt. A substituent having a large dipole moment has been introduced onto the polyurethane molecule, as a result of which the polyurethane polymeric compound exhibits a high dielectric constant and retains the ability to dissolve an ion-conductive salt to a high concentration, has excellent adhesive properties that enable it to firmly bond large surface area materials and conductive materials, and moreover has an interfacial impedance comparable to that of electrolyte solutions. The invention is also directed at a polarizable electrode-forming composition and a polarizable electrode composed primarily of a polyurethane polymer compound, a large surface area material and a conductive material. The invention additionally discloses a high-performance electric double-layer capacitor arrived at using the above compositions and components.