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low-temperature supercapacitorsAn effort to extend the low-temperature operational limit of supercapacitors is currently underway. At present, commercially available non-aqueous supercapacitors are rated for a minimum operating temperature of -40 C. A capability to operate at lower temperatures would be desirable for delivering power to systems that must operate in outer space or in the Polar Regions on Earth. Supercapacitors (also known as double-layer or electrochemical capacitors) offer a high power density (>1,000 W/kg) and moderate energy density (about 5 to 10 Wh/kg) technology for storing energy and delivering power. This combination of properties enables delivery of large currents for pulsed applications, or alternatively, smaller currents for low duty cycle applications. The mechanism of storage of electric charge in a supercapacitor -- at the electrical double-layer formed at a solid-electrode/liquid-electrolyte interface -- differs from that of a primary or secondary electrochemical cell (i.e., a battery) in such a manner as to impart a long cycle life (typically >10(exp 6) charge/discharge cycles).
Document ID
20090011272
Document Type
Other - NASA Tech Brief
Authors
Brandon, Erik J.
(California Inst. of Tech. Pasadena, CA, United States)
West, William C.
(California Inst. of Tech. Pasadena, CA, United States)
Smart, Marshall C.
(California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
July 1, 2008
Publication Information
Publication: NASA Tech Briefs, July 2008
Subject Category
Man/System Technology and Life Support
Distribution Limits
Public
Copyright
Public Use Permitted.

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NameType 20090011272.pdf STI

Related Records

IDRelationTitle20090011262Analytic PrimaryNASA Tech Briefs, July 2008