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Issue 36, 2016
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Lead-free AgNbO3 anti-ferroelectric ceramics with an enhanced energy storage performance using MnO2 modification

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Abstract

Dielectric ceramic materials have been actively studied for advanced pulsed power capacitor applications. Despite the good properties obtained in lead-based ceramics, lead-free counterparts are highly desired due to environmental regulations. This study revealed the potential of AgNbO3 to be a promising lead-free ceramic for energy storage applications. AgNbO3 ceramics fabricated using a conventional solid-state reaction method under an O2 atmosphere show a characteristic anti-ferroelectric (AFE) double hysteresis loop at an electric field of >130 kV cm−1, with a peak recoverable energy storage density (Wrec) of 1.6 J cm−3 at 140 kV cm−1. In addition, the incorporation of MnO2 into AgNbO3 can further increase Wrec, exceeding 2.3 J cm−3 at 150 kV cm−1 by the reduction of the remnant polarization, which is due to the enhanced AFE stability induced by the addition of MnO2. Of particular importance is that the 0.1 wt% MnO2-doped AgNbO3 ceramics were found to possess a good thermal stability with Wrec = 2.5–2.9 J cm−3 over a temperature range of 20–180 °C at 150 kV cm−1 and 1 Hz.

Graphical abstract: Lead-free AgNbO3 anti-ferroelectric ceramics with an enhanced energy storage performance using MnO2 modification

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Publication details

The article was received on 01 Aug 2016, accepted on 30 Aug 2016 and first published on 31 Aug 2016


Article type: Communication
DOI: 10.1039/C6TC03289C
Citation: J. Mater. Chem. C, 2016,4, 8380-8384

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    Lead-free AgNbO3 anti-ferroelectric ceramics with an enhanced energy storage performance using MnO2 modification

    L. Zhao, Q. Liu, S. Zhang and J. Li, J. Mater. Chem. C, 2016, 4, 8380
    DOI: 10.1039/C6TC03289C

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