Relaxor/antiferroelectric composites: a solution to achieve high energy storage performance in lead-free dielectric ceramics

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Relaxor/antiferroelectric composites: a solution to achieve high energy storage performance in lead-free dielectric ceramics

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Relaxor/antiferroelectric composites: a solution to achieve high energy storage performance in lead-free dielectric ceramics

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

2050-7534

Svazek periodika

8

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

5681-5691

Kód UT WoS článku

000534232300035

EID výsledku v databázi Scopus

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