Abstract
Relaxor ferroelectrics (RFEs) are being actively investigated for energy-storage applications due to their large electric-field-induced polarization with slim hysteresis and fast energy charging–discharging capability. Here, a novel nanograin engineering approach based upon high kinetic energy deposition is reported, for mechanically inducing the RFE behavior in a normal ferroelectric Pb(Zr0.52Ti0.48)O3 (PZT), which results in simultaneous enhancement in the dielectric breakdown strength (EDBS) and polarization. Mechanically transformed relaxor thick films with 4 µm thickness exhibit an exceptional EDBS of 540 MV m−1 and reduced hysteresis with large unsaturated polarization (103.6 µC cm−2), resulting in a record high energy-storage density of 124.1 J cm−3 and a power density of 64.5 MW cm−3. This fundamental advancement is correlated with the generalized nanostructure design that comprises nanocrystalline phases embedded within the amorphous matrix. Microstructure-tailored ferroelectric behavior overcomes the limitations imposed by traditional compositional design methods and provides a feasible pathway for realization of high-performance energy-storage materials.
Original language | English (US) |
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Article number | 2302554 |
Journal | Advanced Materials |
Volume | 35 |
Issue number | 45 |
DOIs | |
State | Published - Nov 9 2023 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2023 Wiley-VCH GmbH.
Keywords
- aerosol deposition
- amorphous structures
- breakdown strength
- energy-storage density
- nanograins
- relaxor ferroelectrics
PubMed: MeSH publication types
- Journal Article