High energy storage density in NaNbO_(3) antiferroelectrics with double hysteresis loop  

作　　者：Li Ma Zhenpei Chen Gengguang Luo Zhiyi Che Chao Xu Dongliang Shan Zhenyong Cen Qin Feng Xiyong Chen Toyohisa Fujita Ye Zhu Yunya Liu Jing-Feng Li Shujun Zhang Nengneng Luo 

机构地区：[1]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,School of Resources,Environment and Materials,Guangxi University,Nanning,530004,China [2]School of Chemistry and Chemical Engineering,Guangxi University,Nanning,530004,China [3]Department of Applied Physics,Research Institute for Smart Energy,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China [4]Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education,School of Materials Science and Engineering,Xiangtan University,Xiangtan,411105,Hunan,China [5]State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing,100084,China [6]Institute for Superconducting and Electronic Materials,Australian Institute of Innovative Materials,University of Wollongong,Wollongong,NSW,2500,Australia

出　　处：《Journal of Materiomics》2024年第5期1026-1035,共10页无机材料学学报（英文）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant No.52072080 and 52388201);Guangxi Natural Science Fund for Distinguished Young Scholars(Grant No.2022GXNSFFA035034);Y.Z.acknowledges the support of the Research Grants Council of Hong Kong(Grant No.C5029-18E);J.L.acknowledges the support of Tsinghua-Foshan Innovation Special Fund(TFISF)under Grant No.2020THFS0113;Y.L.acknowledges the support of Hunan Provincial Natural Science Foundation of China(No.2021JJ10006).

摘　　要：Antiferroelectrics(AFEs)possess great potential for high performance dielectric capacitors,due to their distinct double hysteresis loop with high maximum polarization and low remnant polarization.However,the well-known NaNbO_(3) lead-free antiferroelectric(AFE)ceramic usually exhibits square-like P–E loop related to the irreversible AFE P phase to ferroelectric(FE)Q phase transition,yielding low recoverable energy storage density(Wrec).Herein,significantly improved Wrec up to 3.3 J/cm^(3) with good energy storage efficiency(η)of 42.4% was achieved in Na_(0.7)Ag_(0.3)Nb_(0.7)Ta_(0.3)O_(3)(30Agsingle bond30Ta)ceramic with well-defined double P–E loop,by tailoring the A-site electronegativity with Ag+and B-site polarizability with Ta^(5+).The Transmission Electron Microscope,Piezoresponse Force Microscope and in-situ Raman spectra results verified a good reversibility between AFE P phase and high-field-induced FE Q phase.The improved stability of AFE P phase,being responsible for the double P–E loop and improved Wrec,was attributed to the decreased octahedral tilting angles and cation displacements.This mechanism was revealed by synchrotron X-ray diffraction and Scanning Transmission Electron microscope.This work provides a good paradigm for achieving double P–E loop and high energy storage density in NaNbO_(3)-based ceramics.

关 键 词：Sodium niobate ANTIFERROELECTRICS Double hysteresis loop Energy storage performance REVERSIBILITY 

分 类 号：TQ17[化学工程—硅酸盐工业]