High energy storage density and power density achieved simultaneously in NaNbO_(3)-based lead-free ceramics via antiferroelectricity enhancement  

作　　者：Xiaoyan Dong Xu Li Xiuli Chen Hongyun Chen Congcong Sun Junpeng Shi Feihong Pang Huanfu Zhou 

机构地区：[1]Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi,Key Laboratory of Nonferrous Materials and New Processing Technology,Ministry of Education,School of Materials Science and Engineering,Guilin University of Technology,Guilin,541004,China

出　　处：《Journal of Materiomics》2021年第3期629-639,共11页无机材料学学报（英文）

基　　金：supported by Natural Science Foundation of China(Nos.12064007,11664008 and 61761015);Natural Science Foundation of Guangxi(Nos.2018GXNSFFA050001,2017GXNSFDA198027and 2017GXNSFFA198011)。

摘　　要：High-performance lead-free dielectric ceramics with simultaneously high energy storage density and power density are in high demanded for pulse power systems.To realize excellent energy-storage characteristics,a strategy to enhance antiferroelectricity and construct a local random field simultaneously was proposed in this study.Based on the above strategy,a series of(1-x)NaNbO_(3)-xBi(Ni_(1/2)Sn_(1/2))O3[xBNS,x=0.05,0.10,0.15,0.20,and 0.22]solid solutions were designed and fabricated.An ultrahigh energy storage density(Utotal)of 7.35 J/cm^(3),and recoverable energy density(Urec)of 5.00 J/cm^(3) were achieved in the 0.10BNS ceramics.In addition,an adequate stability of energy storage properties at a range of temperatures(20e140℃),frequencies(1e100 Hz),and fatigue test durations(1e1-10^(4) cycles)were realized in 0.10BNS ceramics.0.10BNS ceramics displayed a high current density of 1005 A/cm2,an ultrahigh power density of 100.5 MW/cm^(3,)and an ultrashort discharge time of 46.5 ns?This remarkable performance not only justified our strategy but also confirmed 0.10BNS ceramics as a promising candidate for energy storage.

关 键 词：Lead-free ceramics Energy storage NaNbO_(3)-Based Power density 

分 类 号：TM53[电气工程—电器] TQ174.7[化学工程—陶瓷工业]