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<p>Excellent power density, quick charge/discharge rates, and great energy storage capacity of lead-free dielectric ceramic capacitors have drawn a lot of interest. In this work, doping with Bi<sub>0.88</sub>La<sub>0.12</sub>ScO<sub>3</sub> (BLS) enhanced the relaxation behavior and energy storage characteristics of Bi<sub>0.5</sub>Na<sub>0.46</sub>Li<sub>0.04</sub>TiO<sub>3</sub> (BNLT)-based ceramics. Grain size was greatly lowered from 3.4 to 1.79&#xa0;μm and XRD and SEM studies revealed that the doped La<sup>3+</sup> and Sc<sup>3+</sup> ions were effectively integrated into the matrix lattice. The relaxable index of the ceramics reached 1.92 as the BLS doping content rose; likewise, the recovered energy density (<i>W</i><sub>rec</sub>) and energy efficiency (<i>η</i>) improved. Excellent energy storage properties (<i>W</i><sub>rec</sub> = 5.62&#xa0;J/cm<sup>3</sup>, <i>η</i> = 81%) were shown by the BNLT-0.09BLS ceramic under a field strength of 350&#xa0;kV/cm. In the temperature range of 30 to 200&#xa0;°C and frequency range of 5 to 150&#xa0;Hz, it also displayed good frequency stability and thermal stability. Moreover, charge/discharge experiments showed that the ceramic has an ultra-fast discharge rate (<i>t</i><sub>0.9</sub> = 0.18&#xa0;μs). These outstanding comprehensive characteristics of BNLT-0.09BLS ceramics provide a valuable source of reference for the design of effective dielectric capacitors.</p>

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Study on the relaxation behavior and energy storage properties of (Bi0.88La0.12)ScO3-modified Bi0.5Na0.46Li0.04TiO3 ceramics

  • 期刊论文

  • 发表日期：

    2025年4月22日

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  • Zhongrui Du,
  • Qiyi Yin,
  • Hui Zhang,
  • Hao Zu,
  • Chen Chen,
  • Fan Si,
  • Fei Lin,
  • Xiangyu Zhu,
  • Yulin Zhang,
  • Kunhong Hu,
  • Lu Li,
  • Fulin Zhang,
  • Yunhui Meng

摘要

Excellent power density, quick charge/discharge rates, and great energy storage capacity of lead-free dielectric ceramic capacitors have drawn a lot of interest. In this work, doping with Bi0.88La0.12ScO3 (BLS) enhanced the relaxation behavior and energy storage characteristics of Bi0.5Na0.46Li0.04TiO3 (BNLT)-based ceramics. Grain size was greatly lowered from 3.4 to 1.79 μm and XRD and SEM studies revealed that the doped La3+ and Sc3+ ions were effectively integrated into the matrix lattice. The relaxable index of the ceramics reached 1.92 as the BLS doping content rose; likewise, the recovered energy density (Wrec) and energy efficiency (η) improved. Excellent energy storage properties (Wrec = 5.62 J/cm3, η = 81%) were shown by the BNLT-0.09BLS ceramic under a field strength of 350 kV/cm. In the temperature range of 30 to 200 °C and frequency range of 5 to 150 Hz, it also displayed good frequency stability and thermal stability. Moreover, charge/discharge experiments showed that the ceramic has an ultra-fast discharge rate (t0.9 = 0.18 μs). These outstanding comprehensive characteristics of BNLT-0.09BLS ceramics provide a valuable source of reference for the design of effective dielectric capacitors.