Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/109873
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Title: High energy storage density in NaNbO₃ antiferroelectrics with double hysteresis loop
Authors: Ma, L
Chen, Z
Luo, G
Che, Z
Xu, C 
Shan, D
Cen, Z
Feng, Q
Chen, X
Fujita, T
Zhu, Y 
Liu, Y
Li, JF
Zhang, S
Luo, N
Issue Date: Sep-2024
Source: Journal of materiomics, Sept 2024, v. 10, no. 5, p. 1026-1035
Abstract: Antiferroelectrics (AFEs) possess great potential for high performance dielectric capacitors, due to their distinct double hysteresis loop with high maximum polarization and low remnant polarization. However, the well-known NaNbO3 lead-free antiferroelectric (AFE) ceramic usually exhibits square-like P–E loop related to the irreversible AFE P phase to ferroelectric (FE) Q phase transition, yielding low recoverable energy storage density (Wrec). Herein, significantly improved Wrec up to 3.3 J/cm3 with good energy storage efficiency (η) of 42.4% was achieved in Na0.7Ag0.3Nb0.7Ta0.3O3 (30Agsingle bond30Ta) ceramic with well-defined double P–E loop, by tailoring the A-site electronegativity with Ag+ and B-site polarizability with Ta5+. The Transmission Electron Microscope, Piezoresponse Force Microscope and in-situ Raman spectra results verified a good reversibility between AFE P phase and high-field-induced FE Q phase. The improved stability of AFE P phase, being responsible for the double P–E loop and improved Wrec, was attributed to the decreased octahedral tilting angles and cation displacements. This mechanism was revealed by synchrotron X-ray diffraction and Scanning Transmission Electron microscope. This work provides a good paradigm for achieving double P–E loop and high energy storage density in NaNbO3-based ceramics.
Graphical abstract: [Figure not available: see fulltext.]
Keywords: Antiferroelectrics
Double hysteresis loop
Energy storage performance
Reversibility
Sodium niobate
Publisher: Elsevier BV
Journal: Journal of materiomics 
EISSN: 2352-8478
DOI: 10.1016/j.jmat.2023.11.003
Rights: © 2023 The Authors. Published by Elsevier B.V. on behalf of The Chinese Ceramic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
The following publication Ma, L., Chen, Z., Luo, G., Che, Z., Xu, C., Shan, D., Cen, Z., Feng, Q., Chen, X., Fujita, T., Zhu, Y., Liu, Y., Li, J.-F., Zhang, S., & Luo, N. (2024). High energy storage density in NaNbO3 antiferroelectrics with double hysteresis loop. Journal of Materiomics, 10(5), 1026-1035 is available at https://doi.org/10.1016/j.jmat.2023.11.003.
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