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Research Article | Open Access

Excellent energy storage performance in Bi0.5Na0.5TiO3-based lead-free high-entropy relaxor ferroelectrics via B-site modification

Kaihua Yang1,Gengguang Luo1,Li Ma1Ruoxuan Che1Zhiyi Che1Qin Feng1( )Zhenyong Cen1Xiyong Chen1Jiajun Zhou2( )Nengneng Luo1( )
State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
School of Optical and Electronic Information, Key Lab of Functional Materials for Electronic Information (B) of Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China

Kaihua Yang and Gengguang Luo contributed equally to this work.

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Graphical Abstract


Next-generation advanced high/pulsed power capacitors urgently require dielectric materials with outstanding energy storage performance. Bi0.5Na0.5TiO3-based lead-free materials exhibit high polarization, but the high remanent polarization and large polarization hysteresis limit their applications in dielectric capacitors. Herein, high-entropy perovskite relaxor ferroelectrics (Na0.2Bi0.2Ba0.2Sr0.2Ca0.2)(Ti1−x%Zrx%)O3 are designed by adding multiple ions in the A-site and replacing the B-site Ti4+ with a certain amount of Zr4+. The newly designed system showed high relaxor feature and slim polarization–electric (PE) loops. Especially, improved relaxor feature and obviously delayed polarization saturation were found with the increasing of Zr4+. Of particular importance is that both high recoverable energy storage density of 6.6 J/cm3 and energy efficiency of 93.5% were achieved under 550 kV/cm for the ceramics of x = 6, accompanying with excellent frequency stability, appreciable thermal stability, and prosperous discharge property. This work not only provides potential dielectric materials for energy storage applications, but also offers an effective strategy to obtain dielectric ceramics with ultrahigh comprehensive energy storage performance to meet the demanding requirements of advanced energy storage applications.

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Journal of Advanced Ceramics
Pages 345-353
Cite this article:
Yang K, Luo G, Ma L, et al. Excellent energy storage performance in Bi0.5Na0.5TiO3-based lead-free high-entropy relaxor ferroelectrics via B-site modification. Journal of Advanced Ceramics, 2024, 13(3): 345-353.








Web of Science






Received: 23 November 2023
Revised: 24 January 2024
Accepted: 28 January 2024
Published: 14 March 2024
© The Author(s) 2024.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0,