Ultrahigh Energy Storage in Relaxor Ferroelectric Ceramics with Core–Shell Grains
Source abstract
Abstract
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, K0.5Na0.5NbO3‐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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Dielectric materials and actuators · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory for Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Laboratory for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an Shaanxi 710062 China
School of Physics Harbin Institute of Technology Harbin China
Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China
Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing 100081 China
School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China
Institute for Superconducting and Electronic Materials Faculty of Engineering and Information Sciences University of Wollongong Wollongong New South Wales 2500 Australia
Funding
National Natural Science Foundation of China
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