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Open Access Research Article Issue
Ultrahigh energy storage performance realized in AgNbO3-based antiferroelectric materials via multiscale engineering
Journal of Advanced Ceramics 2023, 12 (6): 1166-1177
Published: 17 May 2023
Downloads:469

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.

Open Access Review Article Issue
Multi-scale synergic optimization strategy for dielectric energy storage ceramics
Journal of Advanced Ceramics 2023, 12 (4): 649-680
Published: 09 March 2023
Downloads:725

Dielectric capacitors, serving as the indispensable components in advanced high-power energy storage devices, have attracted ever-increasing attention with the rapid development of science and technology. Among various dielectric capacitors, ceramic capacitors with perovskite structures show unique advantages in actual application, e.g., excellent adaptability in high-temperature environments. And the optimization of their energy storage performance has become a hot research topic recently. This review presents the basic principles of energy storage in dielectric ceramics and introduces multi-scale synergic optimization strategies according to the key factors for superior energy storage performance. By summarizing the common points in numerous works, several universal modification strategies are reviewed, and future research on fatigue fracture of ceramic capacitors under multi-field including but not limited to force, electric, and thermal coupling conditions is also anticipated.

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