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<p>The increasing demand for high-performance energy storage materials has led to a focus on relaxor ferroelectric (<i>RFE</i>) ceramics, which offer high energy storage density and excellent thermal stability. In this study, a novel (1–<i>x</i>)(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub>–<i>x</i>Sr<sub>0.6</sub>Bi<sub>0.2</sub>Ca<sub>0.1</sub>(Ti<sub>0.5</sub>Zr<sub>0.5</sub>)O<sub>3</sub> ((1-<i>x</i>)NBT-<i>x</i>SBCTZ) ceramic system was designed to enhance energy storage performance at low electric fields. The ceramics were synthesized using a conventional solid-state reaction method and characterized through X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and dielectric measurements. The results revealed that doping with Sr<sub>0.7</sub>Ca<sub>0.3</sub>TiO<sub>3</sub>-based compounds improved the sintering process, refined grain sizes, and enhanced dielectric breakdown strength. At an electric field of 290&#xa0;kV/cm, the ceramics exhibited <i>W</i><sub>rec</sub> of 4.1&#xa0;J/cm<sup>3</sup> and <i>η</i> of 75.1%, demonstrating the effectiveness of the doping strategy. These values are competitive with, and in many cases superior to, those reported for other NBT-based systems under similar field strengths, which typically show <i>W</i><sub>rec</sub> values of 2.5–3.8&#xa0;J/cm<sup>3</sup> and <i>η</i> below 70%. Additionally, the ceramics displayed excellent frequency and temperature stability, making them suitable for a wide range of applications in low-power devices and pulsed power systems. This work offers new insights into the development of energy storage materials with high energy density at low electric fields, presenting a promising avenue for the design of efficient, low-voltage electronic components.</p>

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Enhancing Energy Storage Density of NBT-Based Ceramics at Low Electric Fields via Synergistic Doping and Microstructural Optimization

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Ping Wang,
  • Ning Chen,
  • Shizhong Xie,
  • Zhanhang Zhang,
  • Qibin Yuan

摘要

The increasing demand for high-performance energy storage materials has led to a focus on relaxor ferroelectric (RFE) ceramics, which offer high energy storage density and excellent thermal stability. In this study, a novel (1–x)(Na0.5Bi0.5)TiO3–xSr0.6Bi0.2Ca0.1(Ti0.5Zr0.5)O3 ((1-x)NBT-xSBCTZ) ceramic system was designed to enhance energy storage performance at low electric fields. The ceramics were synthesized using a conventional solid-state reaction method and characterized through X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and dielectric measurements. The results revealed that doping with Sr0.7Ca0.3TiO3-based compounds improved the sintering process, refined grain sizes, and enhanced dielectric breakdown strength. At an electric field of 290 kV/cm, the ceramics exhibited Wrec of 4.1 J/cm3 and η of 75.1%, demonstrating the effectiveness of the doping strategy. These values are competitive with, and in many cases superior to, those reported for other NBT-based systems under similar field strengths, which typically show Wrec values of 2.5–3.8 J/cm3 and η below 70%. Additionally, the ceramics displayed excellent frequency and temperature stability, making them suitable for a wide range of applications in low-power devices and pulsed power systems. This work offers new insights into the development of energy storage materials with high energy density at low electric fields, presenting a promising avenue for the design of efficient, low-voltage electronic components.