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<p>Lead-free BiFeO<sub>3</sub>–BaTiO<sub>3</sub> (BFO–BTO) ceramics possess large spontaneous polarization and high Curie temperature, while their practical energy storage applications are limited by low breakdown strength and recoverable energy density (<i>W</i><sub>reco</sub>). In the present study, Ca/B/Si/K<sub>0.01</sub>/Na<sub>0.02</sub> (CBSKN) glass was introduced into 0.58BiFeO<sub>3</sub>–0.3BaTiO<sub>3</sub>–0.12NaNbO<sub>3</sub> ceramics via conventional solid-state reaction to improve their breakdown strength and recoverable energy storage density. The incorporation of CBSKN glass powder leads to a reduction in the Δ<i>P</i> (<i>P</i><sub>max</sub>–<i>P</i><sub>r</sub>) value of the samples, whereas an appropriate doping content can effectively enhance the electrical breakdown strength of the ceramics. Calculations of energy storage properties show that the CBSKN05 ceramic achieves a maximum energy storage density of 2.13&#xa0;J/cm<sup>3</sup> under an electric field of 190&#xa0;kV/cm. Moreover, the introduction of CBSKN glass effectively enhances the cycling fatigue, thermal and frequency stability, endowing the 0.58BiFeO<sub>3</sub>–0.3BaTiO<sub>3</sub>–0.12NaNbO<sub>3</sub> ceramic with great potential for high-performance energy storage capacitor applications.</p>

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Structural, dielectric, ferroelectric and energy storage properties of 0.58BFO–0.3BTO–0.12NNO + x wt% CBSKN ceramics

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Hui Tang,
  • Ren-Zhi Wang,
  • Qing-Wei Luo,
  • Yuan-Fang Lu,
  • Jiu-Ming Ma

摘要

Lead-free BiFeO3–BaTiO3 (BFO–BTO) ceramics possess large spontaneous polarization and high Curie temperature, while their practical energy storage applications are limited by low breakdown strength and recoverable energy density (Wreco). In the present study, Ca/B/Si/K0.01/Na0.02 (CBSKN) glass was introduced into 0.58BiFeO3–0.3BaTiO3–0.12NaNbO3 ceramics via conventional solid-state reaction to improve their breakdown strength and recoverable energy storage density. The incorporation of CBSKN glass powder leads to a reduction in the ΔP (Pmax–Pr) value of the samples, whereas an appropriate doping content can effectively enhance the electrical breakdown strength of the ceramics. Calculations of energy storage properties show that the CBSKN05 ceramic achieves a maximum energy storage density of 2.13 J/cm3 under an electric field of 190 kV/cm. Moreover, the introduction of CBSKN glass effectively enhances the cycling fatigue, thermal and frequency stability, endowing the 0.58BiFeO3–0.3BaTiO3–0.12NaNbO3 ceramic with great potential for high-performance energy storage capacitor applications.