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<p>High-entropy materials exhibit excellent mechanical strength, high-temperature stability, and chemical durability, making them promising candidates for advanced energy storage and conversion technologies. In this study, novel high-entropy perovskite ceramics, (Pb<sub>0.2</sub>Ca<sub>0.2</sub>Mg<sub>0.2</sub>Sr<sub>0.2</sub>Ba<sub>0.2</sub>) TiO<sub>3</sub> (PCMSBT), were synthesized via a conventional solid-state reaction method, and their energy storage performances were systematically investigated across various sintering temperatures (1175–1300&#xa0;°C). Crucially, the high-entropy design induces severe local lattice distortion, which disrupts the long-range ferroelectric order and promotes robust relaxor ferroelectric behavior, thereby significantly enhancing the energy storage capability. X-ray diffraction and scanning electron microscopy analyses reveal that the ceramics sintered at 1200&#xa0;°C exhibit a compact and highly dense grain structure with prominent lattice distortion. Consequently, the PCMSBT ceramics sintered at this optimal temperature demonstrate a superior recoverable energy storage density of 1.37&#xa0;J/cm<sup>3</sup> and an efficiency of 61% under an applied electric field of 190&#xa0;kV/cm, alongside a high dielectric constant (~ 2705) and low dielectric loss (~ 0.006). These results highlight the profound impact of sintering temperature on the microstructural evolution and functional properties of high-entropy ceramics.</p>

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Effect of sintering temperature on energy storage performance of (Pb0.2Ca0.2Mg0.2Sr0.2Ba0.2) TiO3 high-entropy perovskite ceramics

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Shubao Yang,
  • Jianghai Wang,
  • Zhongxiang Zheng,
  • Weihao Wu,
  • Yiwen Ding,
  • Rongli Gao,
  • Xiaoling Deng,
  • Wei Cai,
  • Chunlin Fu,
  • Junming Li

摘要

High-entropy materials exhibit excellent mechanical strength, high-temperature stability, and chemical durability, making them promising candidates for advanced energy storage and conversion technologies. In this study, novel high-entropy perovskite ceramics, (Pb0.2Ca0.2Mg0.2Sr0.2Ba0.2) TiO3 (PCMSBT), were synthesized via a conventional solid-state reaction method, and their energy storage performances were systematically investigated across various sintering temperatures (1175–1300 °C). Crucially, the high-entropy design induces severe local lattice distortion, which disrupts the long-range ferroelectric order and promotes robust relaxor ferroelectric behavior, thereby significantly enhancing the energy storage capability. X-ray diffraction and scanning electron microscopy analyses reveal that the ceramics sintered at 1200 °C exhibit a compact and highly dense grain structure with prominent lattice distortion. Consequently, the PCMSBT ceramics sintered at this optimal temperature demonstrate a superior recoverable energy storage density of 1.37 J/cm3 and an efficiency of 61% under an applied electric field of 190 kV/cm, alongside a high dielectric constant (~ 2705) and low dielectric loss (~ 0.006). These results highlight the profound impact of sintering temperature on the microstructural evolution and functional properties of high-entropy ceramics.