Issue 41, 2023

Superior energy storage performance realized in antiferroelectric 0.10 wt% MnO2–AgNbO3 ceramics via Bi-doping induced phase engineering

Abstract

Dielectric capacitors based on antiferroelectric ceramics are promising for applications in advanced high-power electric and electronic devices, for which more efforts should be devoted to enhancing the recoverable energy storage density and energy efficiency. In this work, a record-high recoverable energy storage density Wrec up to 9.0 J cm−3 and energy efficiency η of 90% are achieved in lead-free AgNbO3-based ceramics composed of antiferroelectric and paraelectric phases, which were realized by phase engineering via Bi-doping. Compared with pristine AgNbO3, the enhancement in recoverable energy storage density and energy efficiency reaches 621% and 241%, respectively. In addition, the breakdown strength Eb exceeds 650 kV cm−1 in 12 mol% Bi-doped 0.10 wt% MnO2–AgNbO3 ceramics, which greatly contributes to the exceptionally enhanced energy storage performance. The excellent performance could be retained at elevated temperatures, and various frequencies and cycles. Moreover, the discharge energy density Wd in direct-current charge–discharge performance reaches 8.0 J cm−3, which is also superior to those reported in other lead-free dielectric energy storage ceramics. The strategy can provide an applicable method to optimize energy storage performance and other functionalities of dielectric materials.

Graphical abstract: Superior energy storage performance realized in antiferroelectric 0.10 wt% MnO2–AgNbO3 ceramics via Bi-doping induced phase engineering

Supplementary files

Article information

Article type
Paper
Submitted
02 Aug 2023
Accepted
04 Oct 2023
First published
04 Oct 2023

J. Mater. Chem. A, 2023,11, 22512-22521

Superior energy storage performance realized in antiferroelectric 0.10 wt% MnO2–AgNbO3 ceramics via Bi-doping induced phase engineering

J. Wang, X. Fan, Z. Liu, K. Zhu, H. Yuan, Z. Zheng, L. Zhao, J. Zhang, Q. Yuan and J. Li, J. Mater. Chem. A, 2023, 11, 22512 DOI: 10.1039/D3TA04605B

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