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Energy storage performance of silica-coated k0.5Na0.5NbO3-based lead-free ceramics

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Abstract

Potassium sodium niobate-based ceramics have been extensively studied as high-power energy storage capacitor in recent years due to their excellent dielectric properties. We investigated the microstructure, dielectric-temperature spectrum, and energy storage properties of SiO2-coated 0.9(k0.5Na0.5)NbO3–0.1Bi(Zn2/3Nb1/3)O3 (0.9KNN–0.1BZN) ceramics prepared by solid-state sintering and Stöber method. During the sintering process, SiO2 reacted with 0.9KNN–0.1BZN to form the second phase K3Nb3O6Si2O7. Coating SiO2 could improve the dielectric-temperature stability of 0.9KNN–0.1BZN ceramics, and had excellent performance adapting to high-temperature conditions. When the SiO2 content is 1.0 wt%, the maximum energy storage density of 0.9KNN–0.1BZN ceramics is 0.97 J/cm3, and the breakdown field strength is 200 kV/cm. This work expands the application of (k0.5Na0.5)NbO3 ceramics in the field of energy storage capacitors.

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The data and material were available. Data sharing not applicable to this article as no datasets were generated or analyzed during the current study.

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Acknowledgments

This work was supported by the National Key Basic Research Program of China (973 Program) (No. 2015CB654601), the Technical Innovation Special Program of Hubei Province (2017AHB055), the State Key Laboratory of Advanced Technology Materials Synthesis and Processing (Wuhan University of Technology) (2018-KF-11) and the National Natural Science Foundation of China (51872213).

Funding

Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Department (2018-KF-11) and Innovative Research Group Project of the National Natural Science Foundation of China (51872213).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China

    Wenzhang Chen, Minghe Cao, Hongye Wang, Hua Hao & Zhonghua Yao

  2. International School of Material Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China

    Hanxing Liu

Authors
  1. Wenzhang Chen
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  2. Minghe Cao
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  3. Hongye Wang
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  4. Hua Hao
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  5. Zhonghua Yao
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  6. Hanxing Liu
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Contributions

WC: Methodology, Investigation, Writing—original draft. MC: Conceptualization, formal analysis, and supervision. HH and ZY: Discussion. HL: Discussion and funding.

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Correspondence to Minghe Cao.

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Chen, W., Cao, M., Wang, H. et al. Energy storage performance of silica-coated k0.5Na0.5NbO3-based lead-free ceramics. J Mater Sci: Mater Electron 33, 10121–10130 (2022). https://doi.org/10.1007/s10854-022-08002-5

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  • DOI: https://doi.org/10.1007/s10854-022-08002-5

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