Relaxor/antiferroelectric composites: a solution to achieve high energy storage performance in lead-free dielectric ceramics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F20%3APU138310" target="_blank" >RIV/00216305:26620/20:PU138310 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlehtml/2020/tc/d0tc00589d" target="_blank" >https://pubs.rsc.org/en/content/articlehtml/2020/tc/d0tc00589d</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d0tc00589d" target="_blank" >10.1039/d0tc00589d</a>
Alternative languages
Result language
angličtina
Original language name
Relaxor/antiferroelectric composites: a solution to achieve high energy storage performance in lead-free dielectric ceramics
Original language description
Recently developed Na1/2Bi1/2TiO3 (NBT)-based relaxor ferroelectric ceramics are promising lead-free candidates for dielectric energy storage applications because of their non-toxicity and outstanding energy storage properties. Their commercialization currently faces a challenge in that high recoverable energy-storage density (W-rec) and high energy-storage efficiency (eta) cannot be achieved simultaneously. Different from the normal relaxor ferroelectrics whose energy storage density was improved by reducing the remanent polarization and increasing the electric breakdown strength, in this work, a lead-free antiferroelectric (AFE) was utilized to partially replace the NBT-based relaxor (RE) to change the shape of the polarization curve and increase the electric breakdown strength, while maintaining large maximum polarization. Based on this concept, a lead-free RE/AFE 0.94(Na0.82K0.18)(1/2)Bi1/2TiO3-0.06FeNbO(4)/0.96NaNbO(3)-0.04CaZrO(3) (NKBT-FN/NN-CZ) composite ceramic is designed and investigated. Through heat treatment of powder and the traditional solid phase reaction method, NKBT-FN/NN-CZ relaxor/antiferroelectric composites with multi-phase structure of an antiferroelectric embedded in a relaxor ferroelectric were established, and narrow and oblique double hysteresis loops were achieved in these composites. A high W-rec of 2.85 J cm(-3) and high eta of 80% were simultaneously realized at the composition with a mass ratio of 70/30 at room temperature (RT). Furthermore, the newly developed composites exhibit better energy storage characteristics at 120 degrees C, with a high W-rec of 3.5 J cm(-3) as well as a high eta of 91%. This study demonstrates that the design of a relaxor/antiferroelectric composite provides a highly effective method to improve the energy storage performance of lead-free ceramics.
Czech name
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Czech description
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Classification
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
Result continuities
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)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Chemistry C
ISSN
2050-7526
e-ISSN
2050-7534
Volume of the periodical
8
Issue of the periodical within the volume
17
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
5681-5691
UT code for WoS article
000534232300035
EID of the result in the Scopus database
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