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Method of making a high performance ultracapacitor

United States Patent

6,059,847
May 9, 2000
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A high performance double layer capacitor having an electric double layer formed in the interface between activated carbon and an electrolyte is disclosed. The high performance double layer capacitor includes a pair of aluminum impregnated carbon composite electrodes having an evenly distributed and continuous path of aluminum impregnated within an activated carbon fiber preform saturated with a high performance electrolytic solution. The high performance double layer capacitor is capable of delivering at least 5 Wh/kg of useful energy at power ratings of at least 600 W/kg.
Farahmandi; C. Joseph (Auburn, AL), Dispennette; John M. (Auburn, AL)
Maxwell Energy Products, Inc. (San Diego, CA)
08/ 686,580
July 26, 1996
The invention described herein may be subject to limited Government rights and licenses pursuant to the Government Waiver of Invention Rights under Department of Energy (DOE) SubContract EGG-C91-103647.