Controlling internal barrier in low loss BaTiO3 supercapacitors

被引：57

作者：

Chung, U-C. ^{[1
]}

Elissalde, C. ^{[1
]}

Mornet, S. ^{[1
]}

Maglione, M. ^{[1
]}

Estournes, C. ^{[2
,3
]}

机构：

[1] Univ Bordeaux, ICMCB CNRS, F-33608 Pessac, France

[2] Inst Carnot Cirimat, CNRS, F-31062 Toulouse, France

[3] PNF2 CNRS, F-31062 Toulouse 09, France

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 07期

关键词：

barium compounds; dielectric losses; ferroelectric capacitors; ferroelectric ceramics; oxidation; plasma materials processing; silicon compounds; sintering; supercapacitors; CERAMICS; PERMITTIVITY;

D O I：

10.1063/1.3076125

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页数：3

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