Ultrahigh Energy Storage in Relaxor Ferroelectric Ceramics with Core–Shell Grains

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2025-03-30 DOI:10.1002/adfm.202503798

Qizhen Chai, Peng Tan, Leiyang Zhang, Zhaobo Liu, Santan Dang, Zhanhui Peng, Di Wu, Xiaodong Xu, Bohan Xing, Xiaolian Chao, Houbing Huang, Shujun Zhang, Zupei Yang

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Abstract

The achievement of record-high energy storage performance in relaxor-ferroelectric bulk ceramics represents a major advancement in the field of dielectric capacitors. Nonetheless, a trade-off between breakdown strength and polarization has typically limited the optimization of overall performance. Here, guided by a rational composition design, K_0.5Na_0.5NbO₃-based bulk ceramics are fabricated with grain core–shell structures and polymorphic nanodomains, leading to a synergistic enhancement of breakdown strength and polarization. This results in an unprecedented recoverable energy density of ≈20.4 J·cm⁻³ and an energy efficiency of ≈90% at an electric field of ≈1020 kV·cm⁻¹. Additionally, the ceramics exhibits excellent charge–discharge performance, including a high discharge energy density of ≈6.0 J·cm⁻³ and an ultrashort discharge time of ≈42 ns at 500 kV·cm⁻¹, along with superior reliability and stability. These advancements are expected to provide valuable insights for the exploration and utilization of advanced dielectric materials.

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具有核壳晶粒的弛豫铁电陶瓷中的超高能量存储

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.