Superior energy storage performance of BNT-based ferroelectric ceramics based on maintaining high polarization and breakdown strength  

作　　者：Mingjia Jiang Zhanhui Peng Qiyuan Zhou Di Wu Lingling Wei Pengfei Liang Xiaolian Chao Zupei Yang 

机构地区：[1]Key Laboratory for Macromolecular Science of Shaanxi Province,Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Laboratory for Advanced Energy Technology School of Materials Science and Engineering,Shaanxi Normal University,Xi’an 710062,Shaanxi,P.R.China [2]School of Chemistry and Chemical Engineering Shaanxi Normal University,Xi’an 710062 Shaanxi,P.R.China [3]School of Physics and Information Technology Shaanxi Normal University,Xi’an 710062 Shaanxi,P.R.China

出　　处：《Journal of Advanced Dielectrics》2024年第4期20-29,共10页先进电介质学报（英文）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Grant Nos.52272119,52202143);Natural Science Basic Research Plan in the Shaanxi Province of China(Grant Nos.2022JQ338);Young Talent Fund of University Association for Science and Technology in Shaanxi,China(20230415);the Excellent Graduate Training Program of Shaanxi Normal University(Grant No.LHRCCX23221);the Fundamental Innovation Project in School of Materials Science and Engineering(SNNU).

摘　　要：Bi_(0.5)Na_(0.5)TiO_(3)(BNT)-based lead-free ceramics with superior ferroelectric properties are considered to be extremely advantageous in energy storage capacitors for future green technologies.Here,we demonstrate an approach to achieve both ultrahigh energy density W_(rec)and efficiencyηby regulating the multiscale electropolar structures and microstructure.A satisfactory energy storage performance of a high W_(rec)of 4.02 J·cm^(-3),and a decentηof 80%under 415 kV·cm^(-1)are attained in the 0.5(BNT-CS)-0.5SB_(0.2)T ceramic(abbreviated as BNT-0.2SBT).Moreover,BNT-0.2SBT exhibits superior power density(P_(D)=107MW·cm^(-3)),ultrafast discharge time(t_(0.9)=116 ns)at 150 kV·cm^(-1),and good temperature stability.The findings in this work not only demonstrate that a valid candidate,but also provide a new idea of how to achieve both high-energy storage density and efficiency in lead-free ferroelectric materials.

关 键 词：Energy storage Bi_(0.5)Na_(0.5)TiO_(3) ceramics relaxor characteristics breakdown strength 

分 类 号：TM28[一般工业技术—材料科学与工程]