Ultrawide-temperature-stable high-entropy relaxor ferroelectrics for energy-efficient capacitors

作者：Shiyu Zhou, Yucheng Zhou, Linhai Li, Zhenhao Fan, Wenfeng Yue, Zhengqian Fu, Xuefeng Chen, Bai‐Xiang Xu, Tengfei Hu, Dawei Wang, Tongqing Yang · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-63173-z · 被引用次数：21 · 研究领域：Ferroelectric and Piezoelectric Materials、Multiferroics and related materials、Dielectric materials and actuators

The development of dielectric ceramics that simultaneously achieve high energy density and ultra-broad temperature stability remains a fundamental challenge for advanced electrostatic capacitors. Here, we report a high-entropy engineering strategy that transforms conventional relaxor ferroelectric BT-Bi(Mg0.5Zr0.5)O3 into entropy-stabilized BT-H through a dual-phase cationic disorder modulation. By maximizing configurational entropy, this approach induces atomic-scale lattice heterogeneity with reduced size of polar units, and establishes temperature-adaptive multiphase coexistence structure, effectively decoupling polarization configuration from thermal fluctuations. Consequently, the optimized BT-H ceramics exhibit extraordinary recoverable energy density (Wrec) of 8.9 J cm-3, near ideal conversion efficiency (η) of ~ 97.8 % and superior temperature stability of ΔWrec ~±9 % and Δη ~ ±4.8% over a ultrawide operational range (−85-220 °C). This work validates the entropy-mediated cocktail effect, demonstrating that leveraging high-entropy materials to design capacitors with superior integrated energy storage performance is an advanced and viable strategy. The authors achieve high energy storage performance with near-ideal energy conversion efficiency and outstanding temperature stability in the entropy-stabilized ferroelectric ceramics by constructing a temperature-adaptive multiphase coexistence structure.