Superior Energy‐Storage Performance in Sandwich‐Structured AgNbO <sub>3</sub> ‐Based Ceramics
Antiferroelectric (AFE) ceramics with typical double polarization-electric field loops hold exceptional potential for high capacitance density capacitors. However, the inherent contradiction between polarization and breakdown strength limits the energy storage performance in AFE ceramics. Herein, the polarization and breakdown strength are improved simultaneously via optimizing the sandwich structure with alternate large polarization (Ag<sub>0.82</sub>Bi<sub>0.06</sub>)NbO<sub>3</sub> layer and high breakdown strength (Ag<sub>0.70</sub>Bi<sub>0.10</sub>)NbO<sub>3</sub> layer. A recoverable energy storage density W<sub>rec</sub> of 16.8 J cm<sup>-3</sup> with energy efficiency η of 81.3% is realized in (Ag<sub>0.70</sub>Bi<sub>0.10</sub>)NbO<sub>3</sub>/(Ag<sub>0.82</sub>Bi<sub>0.06</sub>)NbO<sub>3</sub>/(Ag<sub>0.70</sub>Bi<sub>0.10</sub>)NbO<sub>3</sub> ceramic, attaining the peak value of AgNbO<sub>3</sub>-based AFE ceramics. Moreover, the sandwich-structured ceramic shows good stabilities with variations of less than 7.0% over a temperature range of 30-150 °C, frequency range of 1-500 Hz, and 10<sup>5</sup> cycling in W<sub>rec</sub>, and a discharge energy density W<sub>d</sub> of 6.2 J cm<sup>-3</sup> along with a fast discharge time t<sub>0.9</sub> of 120 ns. This research provides an effective strategy for enhancing the energy storage performance of lead-free AFE ceramics, highlighting their potential for practical applications in pulse power systems.
Authors
- Houbing Huang (ORCID: https://orcid.org/0000-0002-8006-3495)
- Huajie Luo (ORCID: https://orcid.org/0000-0001-5858-5046)
- Yichen Li (ORCID: https://orcid.org/0000-0001-8799-8843)
- Jing Wang (ORCID: https://orcid.org/0000-0002-7752-1758)
- Weipeng Liu (ORCID: https://orcid.org/0000-0001-8368-0643)
- Ke Xu (ORCID: https://orcid.org/0000-0003-3812-8619)
- Lei Zhao (ORCID: https://orcid.org/0000-0001-9226-2929)
Institutions
- Beijing Institute of Technology (CN)
- Hebei University (CN)
- University of Science and Technology Beijing (CN)
- Nanjing University of Aeronautics and Astronautics (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-11-05
- DOI
- https://doi.org/10.1002/adma.202516723
- Citations
- 2
- Primary Topic
- Ferroelectric and Piezoelectric Materials
- Type
- article
- Field-Weighted Citation Impact
- 1.04
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Hebei Province
- Nanjing University of Aeronautics and Astronautics
- Nanjing University
- Priority Academic Program Development of Jiangsu Higher Education Institutions