Scholarlink

<p>In the new era, there is an increasing demand for high-performance ceramic capacitors with exceptional energy storage density and efficiency to store substantial electrical energy for contingency applications. Antiferroelectric ceramics 0.9NaNbO<sub>3</sub>–0.1(La<sub>0.1</sub>Bi<sub>0.9</sub>Mg<sub>0.5</sub>Ti<sub>0.5</sub>O<sub>3</sub>)-<i>x</i>wt%MnO<sub>2</sub> (abbreviated as 0.9NN–0.1LBMT-<i>x</i>Mn) with different MnO<sub>2</sub> doping concentrations have been prepared in this work. The incorporation of a few amounts of MnO<sub>2</sub> effectively reduces charge carrier concentration, refines grain size, suppresses electrical conductivity, and thereby enhances energy storage density. XRD and XPS analyses confirm the partial reduction of excess Mn<sup>4+</sup> to Mn<sup>3+</sup>, which substitutes B-site cations, indicating that acceptor Mn doping facilitates the generation of oxygen vacancies. The results demonstrate that the&#xa0;0.9NN-0.1LBMT-0.5Mn&#xa0;ceramic achieves a high recoverable energy storage density (<i>W</i><sub>rec</sub>​ = 3.53 J/cm<sup>3</sup>) and an impressive energy storage efficiency (<i>η</i> = 70.3%) under an applied electric field of&#xa0;320 kV/cm. The optimized ceramic exhibits excellent temperature stability (40–140&#xa0;°C) and frequency stability (1–200 Hz), coupled with a high power density (<i>P</i><sub>D</sub> = 77.11 MW/cm<sup>3</sup>) and ultrafast discharge speed (<i>t</i><sub>0.9</sub>​ = 1.04 μs). This work provides valuable insights for achieving high recoverable energy storage density and efficiency, and the&#xa0;0.9NN-0.1LBMT-0.5Mn&#xa0;ceramic demonstrates promising potential for energy storage applications.</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

MnO2-doped NaNbO3 antiferroelectric ceramics with the improved energy storage performance

  • 期刊论文

  • 发表日期：

    2025年9月3日

查看全文
  • Ping Wang,
  • Yao Ying,
  • Naiji Zhou,
  • Hongjuan Wen,
  • Xiusheng Wu,
  • Shenglei Che

摘要

In the new era, there is an increasing demand for high-performance ceramic capacitors with exceptional energy storage density and efficiency to store substantial electrical energy for contingency applications. Antiferroelectric ceramics 0.9NaNbO3–0.1(La0.1Bi0.9Mg0.5Ti0.5O3)-xwt%MnO2 (abbreviated as 0.9NN–0.1LBMT-xMn) with different MnO2 doping concentrations have been prepared in this work. The incorporation of a few amounts of MnO2 effectively reduces charge carrier concentration, refines grain size, suppresses electrical conductivity, and thereby enhances energy storage density. XRD and XPS analyses confirm the partial reduction of excess Mn4+ to Mn3+, which substitutes B-site cations, indicating that acceptor Mn doping facilitates the generation of oxygen vacancies. The results demonstrate that the 0.9NN-0.1LBMT-0.5Mn ceramic achieves a high recoverable energy storage density (Wrec​ = 3.53 J/cm3) and an impressive energy storage efficiency (η = 70.3%) under an applied electric field of 320 kV/cm. The optimized ceramic exhibits excellent temperature stability (40–140 °C) and frequency stability (1–200 Hz), coupled with a high power density (PD = 77.11 MW/cm3) and ultrafast discharge speed (t0.9​ = 1.04 μs). This work provides valuable insights for achieving high recoverable energy storage density and efficiency, and the 0.9NN-0.1LBMT-0.5Mn ceramic demonstrates promising potential for energy storage applications.