Publication:
Investigation of Fumed Silica/Aqueous NaCl Superdielectric Material

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Authors
Jenkins, Natalie
Petty, Clayton
Phillips, Jonathan
Subjects
dielectric
superdielectric
capacitor
Advisors
Date of Issue
2016-02-20
Date
February 20, 2016
Publisher
Language
Abstract
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.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.3390/ma9020118
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Naval Research Program at the Naval Postgraduate School
Format
17 p.
Citation
Jenkins, Natalie, Clayton Petty, and Jonathan Phillips. "Investigation of Fumed Silica/Aqueous NaCl Superdielectric Material." Materials 9.2 (2016): 118.
Distribution Statement
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.
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