Controlling internal barrier in low loss BaTiO 3 supercapacitors
نویسنده
چکیده
Supercapacitor behavior has been reported in a number of oxides including reduced BaTiO 3 ferroelectric ceramics. These so-called giant properties are however not easily controlled. We show here that the continuous coating of individual BaTiO 3 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.
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