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*, Zupei Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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 cm3, η ~ 92% at 500 kV cm1; Wrec ~ 14 J cm3, η ~ 89% at 760 kV cm1). 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.

Original languageEnglish
Article number1633
JournalNature Communications
Volume16
Issue number1
DOIs
Publication statusPublished - Dec 2025

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