Investigation of Fumed Silica/Aqueous NaCl Superdielectric Material
Author
Jenkins, Natalie
Petty, Clayton
Phillips, Jonathan
Date
2016-02-20Metadata
Show full item recordAbstract
A constant current charge/discharge protocol which showed fumed silica filled to the point
of incipient wetness with aqueous NaCl solution to have dielectric constants >10 ⁸ over the full range
of dielectric thicknesses of 0.38–3.9 mm and discharge times of 0.25–>100 s was studied, making this
material another example of a superdielectric. The dielectric constant was impacted by both frequency
and thickness. For time to discharge greater than 10 s the dielectric constant for all thicknesses needed
to be fairly constant, always >10⁹, although trending higher with increasing thickness. At shorter
discharge times the dielectric constant consistently decreased, with decreasing time to discharge.
Hence, it is reasonable to suggest that for time to discharge >10 s the dielectric constant at all
thicknesses will be greater than 10⁹. This in turn implies an energy density for a 5 micron thick
dielectric layer in the order of 350 J/cm³ for discharge times greater than 10 s.
Description
The article of record as published may be found at http://dx.doi.org/10.3390/ma9020118
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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