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Issue 31, 2018
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Novel BaTiO3-based lead-free ceramic capacitors featuring high energy storage density, high power density, and excellent stability

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Abstract

The development of energy storage devices with a high energy storage density, high power density, and excellent stability has always been a long-cherished goal for many researchers as they tackle issues concerning energy conservation and environmental protection. In this work, we report a novel BaTiO3-based lead-free composition (0.85BaTiO3–0.15Bi(Zn1/2Sn1/2)O3) with an ultrahigh energy storage density (2.41 J cm−3) and a high energy storage efficiency of 91.6%, which is superior to other lead-free systems reported recently. The energy storage properties of 0.85BT–0.15BZS ceramic manifest excellent frequency stability (5–1000 Hz) and fatigue endurance (cycle number: 105). The pulsed charging–discharging process is measured to elucidate the actual operation performance in the 0.85BT–0.15BZS ceramic. Delightfully, the 0.85BT–0.15BZS ceramic also possesses an ultrahigh current density of 551 A cm−2 and a giant power density of 30.3 MW cm−3, and the stored energy is released in sub-microseconds. Moreover, the 0.85BT–0.15BZS ceramic exhibits outstanding temperature stability of its dielectric properties, energy storage properties, and charging–discharging performance over a broad temperature range (20–160 °C) due to the weakly-coupled relaxor behavior. These results not only indicate the superior potential of environment-friendly BaTiO3-based relaxor ferroelectric ceramics for the design of ceramic capacitors of both high energy storage and power applications, but they also show the merit of the weakly-coupled relaxor behavior to improve the thermal stability of energy storage properties.

Graphical abstract: Novel BaTiO3-based lead-free ceramic capacitors featuring high energy storage density, high power density, and excellent stability

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Publication details

The article was received on 19 Jun 2018, accepted on 19 Jul 2018 and first published on 19 Jul 2018


Article type: Paper
DOI: 10.1039/C8TC03003K
J. Mater. Chem. C, 2018,6, 8528-8537

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    Novel BaTiO3-based lead-free ceramic capacitors featuring high energy storage density, high power density, and excellent stability

    M. Zhou, R. Liang, Z. Zhou and X. Dong, J. Mater. Chem. C, 2018, 6, 8528
    DOI: 10.1039/C8TC03003K

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