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http://hdl.handle.net/10397/109873
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. |
Appears in Collections: | Journal/Magazine Article |
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