Polymorphic relaxor phase and defect dipole polarization co-reinforced capacitor energy storage in temperature-monitorable high-entropy ferroelectrics

Xiangfu Zeng, Jinfeng Lin, Gaolei Dong, Jie Shen, Luomeng Tang, Qifa Lin, Simin Wang, Min Gao, Chunlin Zhao, Tengfei Lin, Laihui Luo, Chao Chen, Baisheng Sa, Cong Lin, Xiao Wu () and Jiwei Zhai ()
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Xiangfu Zeng: Fuzhou University
Jinfeng Lin: Fujian Normal University and Strait Laboratory of Flexible Electronics (SLoFE)
Gaolei Dong: Fuzhou University
Jie Shen: Fuzhou University
Luomeng Tang: Tongji University
Qifa Lin: Fuzhou University
Simin Wang: Tongji University
Min Gao: Fuzhou University
Chunlin Zhao: Fuzhou University
Tengfei Lin: Fuzhou University
Laihui Luo: Ningbo University
Chao Chen: Jingdezhen Ceramic University
Baisheng Sa: Fuzhou University
Cong Lin: Fuzhou University
Xiao Wu: Fuzhou University
Jiwei Zhai: Tongji University

Nature Communications, 2025, vol. 16, issue 1, 1-13

Abstract: Abstract Energy storage high-entropy ceramics are famous for their ultrahigh power density and ultrafast discharge rate. However, achieving a synchronous combination of high energy density and efficiency along with intelligent temperature-monitorable function remains a significant challenge. Here, based on high-entropy strategy and phase field simulation, the polarization response of domains in Bi0.5Na0.5TiO3-based ceramics is optimized by constructing a concomitant nanostructure of defect dipole polarization and a polymorphic relaxor phase. The optimal ceramic possesses a high recyclable energy storage density (11.23 J cm−3) and a high energy storage efficiency (90.87%) at 670 kV cm−1. Furthermore, real-time temperature sensing is explored based on abnormal fluorescent negative thermal expansion, highlighting the application of intelligent cardiac defibrillation pulse capacitors. This study develops an effective strategy for enhancing the overall energy storage performance of ferroelectric ceramics to overcome the problems of insufficient energy supply and thermal runaway in traditional counterparts.

Date: 2025
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DOI: 10.1038/s41467-025-57139-4

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