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Xu et al. Microstructures 2023;3:2023034 Microstructures
DOI: 10.20517/microstructures.2023.19

Research Article Open Access

Optimizing the energy storage performance of

NaNbO ceramics by rare-earth-based composite
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perovskite Sm(Mg Zr )O modification
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Mingzhao Xu, Dafu Zeng, Xiang Wang, Peng Nong, Yue Pan, Qinpeng Dong, Jiaming Wang, Huanfu Zhou,
Xiuli Chen
Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and
Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China.

Correspondence to: Prof. Huanfu Zhou, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of
Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China.
E-mail: zhouhuanfu@163.com; Prof. Xiuli Chen, Key Laboratory of Nonferrous Materials and New Processing Technology,
Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi,
China. E-mail: cxlnwpu@163.com

How to cite this article: Xu M, Zeng D, Wang X, Nong P, Pan Y, Dong Q, Wang J, Zhou H, Chen X. Optimizing the energy storage
performance of NaNbO ceramics by rare-earth-based composite perovskite Sm(Mg Zr )O modification. Microstructures
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3
3
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2023;3:2023034. https://dx.doi.org/10.20517/microstructures.2023.19
Received: 20 Apr 2023 First Decision: 13 Jul 2023 Revised: 9 Aug 2023 Accepted: 17 Aug 2023 Published: 1 Sep 2023
Academic Editor: Shujun Zhang Copy Editor: Fangyuan Liu Production Editor: Fangyuan Liu

Abstract
Researchers often improve the energy storage performance of NaNbO ceramics through doping with Bi-based
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composites. Recent studies have shown that rare-earth elements, such as La and Sm, can suppress remanent
polarization. In this study, a (1-x)NaNbO Sm(Mg Zr )O ceramic system was designed. Doping with
3-x
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Sm(Mg Zr )O (SMZ) increases the resistance, activation energy, and bandgap of NaNbO ceramics, improves
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the breakdown field strength, and optimizes the energy storage efficiency of NaNbO ceramics. In this study,
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0.92NaNbO -0.08 SMZ achieved an energy storage density of 4.3/cm and an energy storage efficiency of 85.6%
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at 560 kV/cm. When x = 0.15, the sample exhibited an ultrahigh breakdown field strength and energy storage
efficiency (720 kV/cm and 91%, respectively). In addition, the 0.08 SMZ sample had an ultrafast release rate of
2
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t (57 ns), high current density (777.1 A/cm ), and high power density (69.93 MW/cm ). It has practical
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application prospects in high-performance energy storage capacitors.
Keywords: NaNbO , energy storage density, rare-earth modification
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© The Author(s) 2023. Open Access This article is licensed under a Creative Commons Attribution 4.0
International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, sharing,
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