Scholarlink

<p>Dielectric capacitors are highly promising for advanced power electronics due to their superior power density. However, their widespread application has been limited by inadequate energy storage performance. In this work, we propose a distinct strategy, centered on creating a nanofiber-like polar configuration, to achieve ultrahigh energy storage performance in relaxor ferroelectrics. This is realized through a high-entropy composition design in NaNbO<sub>3</sub>-based perovskites, where multiple cations with significant ferroelectric activity and ionic radius differences are introduced at both A- and B-sites. This approach effectively disrupts the long-range ferroelectric and antiferrodistortive orders simultaneously. The resulting nanofiber-like domain structure, which features several nanometers in length but only a few unit cells in width, exhibits a low-hysteresis and nearly linear polarization response to applied electric field (<i>E</i>). Consequently, an exceptional energy storage density (<i>W</i><sub><i>rec</i></sub>) of ~19.3 J cm<sup>−3</sup>, a high efficiency (<i>η</i>) of ~95.2%, and an impressive <i>W</i><sub><i>rec</i></sub>/<i>E</i> coefficient of 208 J kV mm<sup>−3</sup> are simultaneously achieved in the NaNbO<sub>3</sub>-(Bi<sub>0.5</sub>Li<sub>0.5</sub>)(Ti<sub>0.8</sub>Zr<sub>0.1</sub>Sn<sub>0.1</sub>)O<sub>3</sub> multilayer ceramic capacitors. These results underscore the immense potential of the nanofiber-like polar configuration strategy for developing high-performance dielectric energy storage materials.</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

Nanofiber-like polar configurations enable ultrahigh energy storage in relaxor ferroelectrics via high-entropy design

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月23日

查看全文
  • Ning Liu,
  • Aiwen Xie,
  • Liqiang He,
  • Ao Tian,
  • Xiang Wu,
  • Zehao Li,
  • Ruzhong Zuo,
  • Xiaofan Sun,
  • Wenwen Wu,
  • Fang Qi,
  • Xia Fang,
  • Zupei Yang,
  • Zhen Wang,
  • Shaoming Dong

摘要

Dielectric capacitors are highly promising for advanced power electronics due to their superior power density. However, their widespread application has been limited by inadequate energy storage performance. In this work, we propose a distinct strategy, centered on creating a nanofiber-like polar configuration, to achieve ultrahigh energy storage performance in relaxor ferroelectrics. This is realized through a high-entropy composition design in NaNbO3-based perovskites, where multiple cations with significant ferroelectric activity and ionic radius differences are introduced at both A- and B-sites. This approach effectively disrupts the long-range ferroelectric and antiferrodistortive orders simultaneously. The resulting nanofiber-like domain structure, which features several nanometers in length but only a few unit cells in width, exhibits a low-hysteresis and nearly linear polarization response to applied electric field (E). Consequently, an exceptional energy storage density (Wrec) of ~19.3 J cm−3, a high efficiency (η) of ~95.2%, and an impressive Wrec/E coefficient of 208 J kV mm−3 are simultaneously achieved in the NaNbO3-(Bi0.5Li0.5)(Ti0.8Zr0.1Sn0.1)O3 multilayer ceramic capacitors. These results underscore the immense potential of the nanofiber-like polar configuration strategy for developing high-performance dielectric energy storage materials.