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Issue 22, 2020
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Fatigue resistant lead-free multilayer ceramic capacitors with ultrahigh energy density

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Abstract

The critical role of electrical homogeneity in optimising electric-field breakdown strength (BDS) and energy storage in high energy density (0.7 − x)BiFeO3–0.3BaTiO3xBi(Li0.5Nb0.5)O3 (BF–BT–xBLN) lead-free capacitors is demonstrated. The high BDS for bulk ceramics and multilayers (dielectric layer thickness ∼ 8 μm) of ∼260 and ∼950 kV cm−1, respectively, gives rise to record-performance of recoverable energy density, Wrec = 13.8 J cm−3 and efficiency, η = 81%. Under an electric field of 400 kV cm−1, multilayers are temperature stable up to 100 °C, frequency independent in the range 10−2 to 102 Hz, have low strain (<0.03%) and are fatigue-resistant up to 104 cycles (Wrec variation < 10%). These properties show promise for practical use in pulsed power systems.

Graphical abstract: Fatigue resistant lead-free multilayer ceramic capacitors with ultrahigh energy density

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Supplementary files

Article information


Submitted
06 Jan 2020
Accepted
12 May 2020
First published
12 May 2020

This article is Open Access

J. Mater. Chem. A, 2020,8, 11414-11423
Article type
Paper

Fatigue resistant lead-free multilayer ceramic capacitors with ultrahigh energy density

G. Wang, Z. Lu, H. Yang, H. Ji, A. Mostaed, L. Li, Y. Wei, A. Feteira, S. Sun, D. C. Sinclair, D. Wang and I. M. Reaney, J. Mater. Chem. A, 2020, 8, 11414
DOI: 10.1039/D0TA00216J

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