Achieving stable relaxor antiferroelectric P phase in NaNbO_(3)-based lead-free ceramics for energy-storage applications

作     者：Aiwen Xie Jian Fu Ruzhong Zuo Aiwen Xie;Jian Fu;Ruzhong Zuo

作者机构：Institute of Electro Ceramics&DevicesSchool of Materials Science and EngineeringHefei University of TechnologyHefei230009China Anhui Key Laboratory of High-performance Non-ferrous Metal MaterialsSchool of Materials Science and EngineeringAnhui Polytechnic UniversityWuhu241000China 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2022年第8卷第3期

页      面：618-626页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：Financial support from the National Natural Science Foundation of China(Grant No.52072103 and U19A2087) the AHPU innovation team project(S022021058)is gratefully acknowledged 

主　　题：Lead-free ceramic Relaxor antiferroelectric Energy-storage capacitor NaNbO_(3) Phase transition 

摘      要：Compared with antiferroelectric(AFE)orthothombic R phases,AFE orthothombic P phases in Na NbO_(3)(NN)ceramics have been rarely investigated,particularly in the field of energy-storage *** main bottlenedk is closely related to the contradiction between d fficultly achieved stable relaxor AFE P phase and easily induced P-R phase transition during modifying dhemical ***,we reporta novel lead-free AFE ceramic of(1-x)NN-x(Bi_(0.5)K_(0.5))ZrO_(3)((1-x)NN-xBKZ)with a pure AFE P phase str ucture,which exhibits excellent energy-storage characteristics,such as an ultrahigh recoverable energy density(W_(rec))-4.4 J/cm^(3) at x=0.11,a large powder density P_(D)-104 MW/cm^(3) and a fast discharge rate t_(0.9)-45 *** analysis of polarization-field response,Raman spectrum and transmission elecron microscopy demonstrates that the giant amplification of W_(rec) by≥177% should be ma inly ascribed to the simultaneously and effectively enhanced AFE P phase stbility and its relaxor dharacteristics,resulting in a diffused reversible electric field-induced AFE P-ferroelectric phase transition with concurrently *** driving electric *** from mast(1-x)NN-xABO_(3) systems,it was found that the reduced polarizability of B-site cations dominates the enhanced AFE P-phase stability in(1-x)NN-xBKZ ceramics,but the almost unchanged tolerance factor tends to ause the AFE R phase to be induced at a relatively high x value.