Ultra-Weak Polarization-Strain Coupling Effect Boosts Capacitive Energy Storage

Ultra-Weak Polarization-Strain Coupling Effect Boosts Capacitive Energy Storage

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 41 vom: 02. Okt., Seite e2406219
1. Verfasser: Zhang, Leiyang (VerfasserIn)
Weitere Verfasser: Jing, Ruiyi, Huang, Yunyao, Yang, Yule, Li, Yang, Tang, Mingyang, Cao, Shuyao, Chen, Zibin, Gao, Feng, Du, Yuxiao, Zhou, Shiyu, Zhao, Jianwei, Liu, Shiyu, Wang, Dawei, Zhang, Shujun, Jin, Li
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article BNT‐based ceramics electrostrictive strain energy storage relaxor ferroelectrics
Beschreibung
Zusammenfassung:© 2024 Wiley‐VCH GmbH.
In pulse power systems, multilayer ceramic capacitors (MLCCs) encounter significant challenges due to the heightened loading electric field (E), which can lead to fatigue damage and ultrasonic concussion caused by electrostrictive strain. To address these issues, an innovative strategy focused on achieving an ultra-weak polarization-strain coupling effect is proposed, which effectively reduces strain in MLCCs. Remarkably, an ultra-low electrostrictive coefficient (Q33) of 0.012 m4 C-2 is achieved in the composition 0.55(Bi0.5Na0.5)TiO3-0.45Pb(Mg1/3Nb2/3)O3, resulting in a significantly reduced strain of 0.118% at 330 kV cm-1. At the atomic scale, the local structural heterogeneity leads to an expanded and loose lattice structure, providing ample space for large ionic displacement polarization instead of lattice stretching when subjected to the applied E. This unique behavior not only promotes energy storage performance (ESP) but also accounts for the observed ultra-low Q33 and strain. Consequently, the MLCC device exhibits an impressive energy storage density of 14.6 J cm-3 and an ultrahigh efficiency of 93% at 720 kV cm-1. Furthermore, the superior ESP of the MLCC demonstrates excellent fatigue resistance and temperature stability, making it a promising solution for practical applications. Overall, this pivotal strategy offers a cost-effective solution for state-of-the-art MLCCs with ultra-low strain-vibration in pulse power systems
Beschreibung:Date Revised 10.10.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202406219