Constructing layered structures to enhance the breakdown strength and energy density of Na0.5Bi0.5TiO3-based lead-free dielectric ceramics

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F19%3APU134811" target="_blank" >RIV/00216305:26620/19:PU134811 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/Content/ArticleLanding/2018/TC/C8TC04447C#!divAbstract" target="_blank" >https://pubs.rsc.org/en/Content/ArticleLanding/2018/TC/C8TC04447C#!divAbstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c9tc05637h" target="_blank" >10.1039/c9tc05637h</a>

Result language
angličtina
Original language name
Constructing layered structures to enhance the breakdown strength and energy density of Na0.5Bi0.5TiO3-based lead-free dielectric ceramics
Original language description
The improvement of breakdown strength for NBT-based ceramics is currently the main challenge in applications of lead-free dielectric energy-storage materials. In this study, large-polarization 0.65Na(0.5)Bi(0.5)TiO(3)-0.35SrTiO(3) (NBST) and high-efficiency 0.45Na(0.5)Bi(0.5)TiO(3)-0.55Sr(0.7)Bi(0.2)TiO(3) (NBSBT) ceramics were selected to construct layered ceramics. The effect of the number of interfaces on breakdown behavior and polarization was investigated by controlling the stacking of layered ceramics. The single-layer NBST/NBSBT alternately stacked layered ceramics achieved a maximum breakdown strength of 242 kV cm(-1), resulting in high recoverable energy storage density (4.48 J cm(-3)) and efficiency (similar to 90%). Meanwhile, the energy storage performance of NBST/NBSBT layered ceramics also exhibits excellent frequency (10-200 Hz) and temperature (25-125 degrees C) stability. The results prove that the large number of interfaces is beneficial to obtain high breakdown strength and maximum polarization, which brings new enlightenment to further improve the energy storage density of NBT-based materials.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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