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

Shiyu Zhou, Yucheng Zhou, Linhai Li, Zhenhao Fan, Wenfeng Yue, Zhengqian Fu, Xuefeng Chen, Baixiang Xu, Tengfei Hu (), Dawei Wang () and Tongqing Yang ()
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Shiyu Zhou: Tongji University
Yucheng Zhou: Technische Universität Darmstadt
Linhai Li: Chinese Academy of Sciences
Zhenhao Fan: Harbin Institute of Technology
Wenfeng Yue: Harbin Institute of Technology
Zhengqian Fu: Chinese Academy of Sciences
Xuefeng Chen: Chinese Academy of Sciences
Baixiang Xu: Technische Universität Darmstadt
Tengfei Hu: Chinese Academy of Sciences
Dawei Wang: Harbin Institute of Technology
Tongqing Yang: Tongji University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract 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.

Date: 2025
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DOI: 10.1038/s41467-025-63173-z

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