Excellent energy storage properties in lead-free ferroelectric ceramics via heterogeneous structure design

Qizhen Chai, Zhaobo Liu, Zhongqi Deng, Zhanhui Peng, Xiaolian Chao, Jiangbo Lu (), Houbing Huang (), Shujun Zhang () and Zupei Yang ()
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Qizhen Chai: Shaanxi Normal University
Zhaobo Liu: Beijing Institute of Technology
Zhongqi Deng: Shaanxi Normal University
Zhanhui Peng: Shaanxi Normal University
Xiaolian Chao: Shaanxi Normal University
Jiangbo Lu: Shaanxi Normal University
Houbing Huang: Beijing Institute of Technology
Shujun Zhang: University of Wollongong
Zupei Yang: Shaanxi Normal University

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Dielectric capacitors with ultrahigh power density have emerged as promising candidates for essential energy storage components in electronic and electrical systems. They enable enhanced integration, miniaturization, and lightweight design. However, the development of dielectric materials for cutting-edge energy storage applications has been significantly limited by their low recoverable energy storage density (Wrec) and energy efficiency (η), especially at moderate electric fields. In this study, we fabricated 0.85K0.5Na0.5NbO3-0.15Sr0.7Nd0.2ZrO3 ceramics with an outstanding energy storage performance (Wrec ~ 7 J cm−3, η ~ 92% at 500 kV cm−1; Wrec ~ 14 J cm−3, η ~ 89% at 760 kV cm−1). The exceptional energy storage performance can be primarily attributed to the heterogeneous structure, where orthorhombic and tetragonal polar nanoregions are embedded in a cubic matrix. This work provides a good paradigm for designing dielectric materials with ultrahigh energy storage density and excellent energy efficiency at a moderate applied electric field, aligning with the stringent demands for advanced energy storage applications.

Date: 2025
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DOI: 10.1038/s41467-025-56767-0

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