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<p>Antiferroelectrics (AFEs) are long facing the challenge of achieving both high energy storage density and efficiency for dielectric capacitor applications. In this work, a composite regulation strategy based on AFEs is proposed to enhance the energy storage performance of ceramics. Herein, Al<sub>2</sub>O<sub>3</sub> plates were introduced into a relaxor (Pb<sub>0.955</sub>La<sub>0.03</sub>)(Zr<sub>0.6</sub>Sn<sub>0.4</sub>)<sub>0.975</sub>Ta<sub>0.02</sub>O<sub>3</sub> (PLZST) AFE matrix and parallel aligned to construct PLZST-Al<sub>2</sub>O<sub>3</sub> composite ceramics. Consequently, the composite ceramics with 0.5-wt% Al<sub>2</sub>O<sub>3</sub> plates manifest a significant improvement in breakdown strength from 350 to 560&#xa0;kV/cm. This results into an excellent recoverable energy storage density (<i>W</i><sub>rec</sub> = 10.6&#xa0;J/cm<sup>3</sup>) and a remarkable energy efficiency (<i>η</i> = 91.0%), representing a 50% enhancement in <i>W</i><sub>rec</sub> compared to the pure PLZST ceramic (7.0&#xa0;J/cm<sup>3</sup>). The Al<sub>2</sub>O<sub>3</sub> plates formed a bound with the ceramic matrix, which effectively blocks charge migration, thus boosting energy storage density. This work demonstrates that the PLZST-Al<sub>2</sub>O<sub>3</sub> composite ceramics are promising candidates for energy storage applications.</p> Graphical abstract <p></p>

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Ultrahigh energy storage density and efficiency in PLZST-based relaxor antiferroelectric composite ceramics

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Yanxin Peng,
  • Xiafeng He,
  • Guiyan Chen,
  • Junhua Ma,
  • Rui Huang,
  • Zhenyong Cen,
  • Xiyong Chen,
  • Jiadong Zang,
  • Haibo Zhang,
  • Nengneng Luo

摘要

Antiferroelectrics (AFEs) are long facing the challenge of achieving both high energy storage density and efficiency for dielectric capacitor applications. In this work, a composite regulation strategy based on AFEs is proposed to enhance the energy storage performance of ceramics. Herein, Al2O3 plates were introduced into a relaxor (Pb0.955La0.03)(Zr0.6Sn0.4)0.975Ta0.02O3 (PLZST) AFE matrix and parallel aligned to construct PLZST-Al2O3 composite ceramics. Consequently, the composite ceramics with 0.5-wt% Al2O3 plates manifest a significant improvement in breakdown strength from 350 to 560 kV/cm. This results into an excellent recoverable energy storage density (Wrec = 10.6 J/cm3) and a remarkable energy efficiency (η = 91.0%), representing a 50% enhancement in Wrec compared to the pure PLZST ceramic (7.0 J/cm3). The Al2O3 plates formed a bound with the ceramic matrix, which effectively blocks charge migration, thus boosting energy storage density. This work demonstrates that the PLZST-Al2O3 composite ceramics are promising candidates for energy storage applications.

Graphical abstract