Controlling internal barrier in low loss BaTiO3 supercapacitors
- 16 February 2009
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 94 (7)
- https://doi.org/10.1063/1.3076125
Abstract
Supercapacitor behavior has been reported in a number of oxides including reduced BaTiO3 ferroelectric ceramics. These so-called giant properties are however not easily controlled. We show here that the continuous coating of individual BaTiO3 grains by a silica shell in combination with spark plasma sintering is a way to process bulk composites having supercapacitor features with low dielectric losses and temperature stability. The silica shell acts both as an oxidation barrier during the processing and as a dielectric barrier in the final composite.Keywords
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