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:
Mar. 10, 1998
Filed:
Feb. 28, 1996
Joseph Anthony King, Jr, Schenectady, NY (US);
Peter David Phelps, Schenectady, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Ultracapacitors including at least one cell with two solid, non-porous current collectors, two porous electrodes, preferably of carbon, and a porous separator between the electrodes, employ as electrolytes materials comprising at least one hexasubstituted guanidinium salt. Such salts may be employed in solution in a stable organic liquid such as propylene carbonate, or neat in liquid form. They may be prepared by first preparing a hexasubstituted guanidinium halide and then performing an anion exchange reaction, either with a salt which forms an insoluble halide such as a silver salt or by a liquid--liquid extraction method.