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

Kaihua Yang; Gengguang Luo; Li Ma; Ruoxuan Che; Zhiyi Che; Qin Feng; Zhenyong Cen; Xiyong Chen; Jiajun Zhou; Nengneng Luo

doi:10.26599/JAC.2024.9220859

Journal of Advanced Ceramics (Mar 2024)

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

Kaihua Yang,
Gengguang Luo,
Li Ma,
Ruoxuan Che,
Zhiyi Che,
Qin Feng,
Zhenyong Cen,
Xiyong Chen,
Jiajun Zhou,
Nengneng Luo

Affiliations

Kaihua Yang: 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
Gengguang Luo: 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
Li Ma: 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
Ruoxuan Che: 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
Zhiyi Che: 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
Qin Feng: 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
Zhenyong Cen: 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
Xiyong Chen: 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
Jiajun Zhou: 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
Nengneng Luo: 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

DOI: https://doi.org/10.26599/JAC.2024.9220859
Journal volume & issue: Vol. 13, no. 3
pp. 345 – 353

Abstract

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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 (P–E) 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.

Published in Journal of Advanced Ceramics

ISSN: 2226-4108 (Print); 2227-8508 (Online)
Publisher: Tsinghua University Press
Country of publisher: China
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: https://www.sciopen.com/journal/2226-4108

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