Investigation of Fumed Silica/Aqueous NaCl Superdielectric Material
AbstractA constant current charge/discharge protocol which showed fumed silica filled to the point of incipient wetness with aqueous NaCl solution to have dielectric constants >108 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. View Full-Text
Share & Cite This Article
Jenkins, N.; Petty, C.; Phillips, J. Investigation of Fumed Silica/Aqueous NaCl Superdielectric Material. Materials 2016, 9, 118.
Jenkins N, Petty C, Phillips J. Investigation of Fumed Silica/Aqueous NaCl Superdielectric Material. Materials. 2016; 9(2):118.Chicago/Turabian Style
Jenkins, Natalie; Petty, Clayton; Phillips, Jonathan. 2016. "Investigation of Fumed Silica/Aqueous NaCl Superdielectric Material." Materials 9, no. 2: 118.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.