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Antiferroelectric (AFE) materials are promising for the applications in advanced high-power electric and electronic devices. Among them, AgNbO3 (AN)-based ceramics have gained considerable attention due to their excellent energy storage performance. Herein, multiscale synergistic modulation is proposed to improve the energy storage performance of AN-based materials, whereby the multilayer structure is employed to improve the breakdown strength (Eb), and Sm/Ta doping is utilized to enhance the AFE stability. As a result, ultrahigh recoverable energy storage density (Wrec) up to 15.0 J·cm−3 and energy efficiency of 82.8% are obtained at 1500 kV·cm−1 in Sm/Ta co-doped AN multilayer ceramic capacitor (MLCC), which are superior to those of the state-of-the-art AN-based ceramic capacitor. Moreover, the discharge energy density (Wd) in direct-current charge–discharge performance reaches 9.1 J·cm−3, which is superior to that of the reported lead-free energy storage systems. The synergistic design of composition and multilayer structure provides an applicable method to optimize the energy storage performance in all dielectric energy storage systems.


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Ultrahigh energy storage performance realized in AgNbO3-based antiferroelectric materials via multiscale engineering

Show Author's information Mingyuan Zhaoa,bJing Wangb( )Ji ZhangcLi-Feng Zhud( )Lei Zhaoa( )
Key Laboratory of High-Precision Computation and Application of Quantum Field Theory of Hebei Province, College of Physics Science & Technology, Hebei University, Baoding 071002, China
State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
School of Materials Science and Engineering, Nanjing University of Science & Technology, Nanjing 210094, China
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Abstract

Antiferroelectric (AFE) materials are promising for the applications in advanced high-power electric and electronic devices. Among them, AgNbO3 (AN)-based ceramics have gained considerable attention due to their excellent energy storage performance. Herein, multiscale synergistic modulation is proposed to improve the energy storage performance of AN-based materials, whereby the multilayer structure is employed to improve the breakdown strength (Eb), and Sm/Ta doping is utilized to enhance the AFE stability. As a result, ultrahigh recoverable energy storage density (Wrec) up to 15.0 J·cm−3 and energy efficiency of 82.8% are obtained at 1500 kV·cm−1 in Sm/Ta co-doped AN multilayer ceramic capacitor (MLCC), which are superior to those of the state-of-the-art AN-based ceramic capacitor. Moreover, the discharge energy density (Wd) in direct-current charge–discharge performance reaches 9.1 J·cm−3, which is superior to that of the reported lead-free energy storage systems. The synergistic design of composition and multilayer structure provides an applicable method to optimize the energy storage performance in all dielectric energy storage systems.

Keywords: energy storage, multilayer structure, antiferroelectric (AFE), AgNbO3 (AN)-based ceramics

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Publication history

Received: 30 January 2023
Revised: 28 February 2023
Accepted: 21 March 2023
Published: 17 May 2023
Issue date: June 2023

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© The Author(s) 2023.

Acknowledgements

This work was supported by the Natural Science Foundation of Hebei Province, China (E2021201044), and the National Natural Science Foundation of China (51802068 and 52073144).

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