Issue 22, 2022

Excellent energy storage and discharge performances in Na1/2Bi1/2TiO3-based ergodic relaxors by enlarging the [AO12] cages

Abstract

In this work, a lead-free 0.86(0.93Na1/2Bi1/2TiO3-0.07BaTiO3)-0.14K1/2Bi1/2(Zn1/3Nb2/3)O3 (KBZN14) ergodic relaxor demonstrates excellent energy storage performance: Ws = 6.48 J cm−3, Wr = 5.10 J cm−3, and η = 80% at a moderate field of 29.0 kV mm−1, accompanied by an outstanding frequency and temperature stability as well as a fast discharge rate t0.9 of 69–79 ns. The excellent energy storage performance of the sample KBZN14 originates from the synergic effect of KBZN introduction: the enlargement of the [AO12] cages of the pseudocubic perovskite host to facilitate the local polarization, and the complex cations (Zn1/3Nb2/3)4+ destroy the long-range correlations to percolate the polar nanoregions (PNRs) to room temperature. Our work provides a way to design NBT-based materials as a candidate for high energy density and pulse capacitor applications.

Graphical abstract: Excellent energy storage and discharge performances in Na1/2Bi1/2TiO3-based ergodic relaxors by enlarging the [AO12] cages

Supplementary files

Article information

Article type
Paper
Submitted
28 Feb 2022
Accepted
15 May 2022
First published
16 May 2022

J. Mater. Chem. C, 2022,10, 8845-8853

Excellent energy storage and discharge performances in Na1/2Bi1/2TiO3-based ergodic relaxors by enlarging the [AO12] cages

M. Li, M. Zhu, M. Zheng, Y. Hou, J. Wang, X. Chao, Z. Yang, J. Zhou, K. Wang and X. Ke, J. Mater. Chem. C, 2022, 10, 8845 DOI: 10.1039/D2TC00812B

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