Scholarlink

<p>Among the notable features of the lead-free material KNbO<sub>3</sub> (KNb) are its exceptional energy storage density (W<sub>rec</sub>) and high breakdown electric field strength (E<sub>b</sub>). However, the considerable energy loss associated with KNb limits its applicability in energy storage, adversely affecting both W<sub>rec</sub> and efficiency (η) under strong electric fields. This study explores an innovative approach to enhance the energy storage capacity of NBT-SrT-<i>x</i>KNb ceramics (<i>x</i> = 0.1–0.4). The incorporation of KNb disrupts the long-range ordered structure and effectively reduces grain size, resulting in the formation of polar nanoregions (PNRs) that help mitigate energy density loss. As the concentration of KNb increases, significant improvements in both W<sub>rec</sub> and η are observed. NBT-SrT-<i>x</i>KNb (<i>x</i> = 0.3) exhibits the best performance among all variations, achieving a high energy storage density (W<sub>rec</sub> = 3.13&#xa0;J/cm<sup>3</sup>), rapid conversion efficiency (<i>η</i> = 85%), and excellent breakdown strength. Under a mild electric field 30&#xa0;kV/cm, the substitution of KNb results in a significant strain response of approximately 0.24%. Additionally, a longitudinal strain value of 129 pC/N was recorded. These lead-free ceramics present compelling candidates for current energy storage applications as well as next-generation electro ceramics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Impedance and energy storage properties of NBT-SrTiO3–KNbO3lead-free ceramics

  • 期刊论文

  • 发表日期：

    2025年1月17日

查看全文
  • A. Muni Krishnaiah,
  • A. Kalpana,
  • P. N. Mayuri,
  • P. Geetha,
  • V. Poli Reddy,
  • Pushpalatha Kavuluri,
  • J. V. Satyanarayana,
  • P. Mohan Babu,
  • Virupakshi Prabhakar,
  • Ramanaiah Malla

摘要

Among the notable features of the lead-free material KNbO3 (KNb) are its exceptional energy storage density (Wrec) and high breakdown electric field strength (Eb). However, the considerable energy loss associated with KNb limits its applicability in energy storage, adversely affecting both Wrec and efficiency (η) under strong electric fields. This study explores an innovative approach to enhance the energy storage capacity of NBT-SrT-xKNb ceramics (x = 0.1–0.4). The incorporation of KNb disrupts the long-range ordered structure and effectively reduces grain size, resulting in the formation of polar nanoregions (PNRs) that help mitigate energy density loss. As the concentration of KNb increases, significant improvements in both Wrec and η are observed. NBT-SrT-xKNb (x = 0.3) exhibits the best performance among all variations, achieving a high energy storage density (Wrec = 3.13 J/cm3), rapid conversion efficiency (η = 85%), and excellent breakdown strength. Under a mild electric field 30 kV/cm, the substitution of KNb results in a significant strain response of approximately 0.24%. Additionally, a longitudinal strain value of 129 pC/N was recorded. These lead-free ceramics present compelling candidates for current energy storage applications as well as next-generation electro ceramics.