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Issue 9, 2018
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Bismuth ferrite-based lead-free ceramics and multilayers with high recoverable energy density

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Abstract

Lead-free ceramics with high recoverable energy density (Wrec) and energy storage efficiency (η) are attractive for advanced pulsed power capacitors to enable greater miniaturization and integration. In this work, dense bismuth ferrite (BF)-based, lead-free 0.75(Bi1−xNdx)FeO3-0.25BaTiO3 (BNxF-BT) ceramics and multilayers were fabricated. A transition from a mixed pseudocubic and R3c to a purely pseudocubic structure was observed as x increased with the optimum properties obtained for mixed compositions. The highest energy densities, W ∼ 4.1 J cm−3 and Wrec ∼ 1.82 J cm−3, were achieved for BN15F-BT, due to the enhanced breakdown field strength (BDS ∼ 180 kV cm−1) and large maximum polarization (Pmax ∼ 40 μC cm−2). The multilayers of this composition possessed both a high Wrec of 6.74 J cm−3 and η of 77% and were stable up to 125 °C. Nd doped BF-based ceramics with enhanced BDS and large Wrec are therefore considered promising candidates for lead-free energy storage applications.

Graphical abstract: Bismuth ferrite-based lead-free ceramics and multilayers with high recoverable energy density

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Article information


Submitted
08 11 2017
Accepted
28 1 2018
First published
02 2 2018

J. Mater. Chem. A, 2018,6, 4133-4144
Article type
Paper

Bismuth ferrite-based lead-free ceramics and multilayers with high recoverable energy density

D. Wang, Z. Fan, D. Zhou, A. Khesro, S. Murakami, A. Feteira, Q. Zhao, X. Tan and Ian M. Reaney, J. Mater. Chem. A, 2018, 6, 4133
DOI: 10.1039/C7TA09857J

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