Ultra-fast charge-discharge and high-energy storage performance realized in K_(0.5)Na_(0.5)NbO_(3)-Bi(Mn_(0.5)Ni_(0.5))O_(3) ceramics  

作　　者：Xinru Nie Yan He Qiangqiang Shi Yuqian Liang Lingling Wei Pengfei Liang Xiaolian Chao Guoxin Hu 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》2023年第1期46-56,共11页先进电介质学报（英文）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Grant No.52272119,51872177);the Natural Science Basic Research Plan in the Shaanxi Province of China(Grant No.2021ZDLSF06-03,2021JM-201);the Fundamental Research Funds for the Central Universities(Program No.GK202002014);the Fondamental Innovation Project in School of Materials Science and Engineering(SNNU).

摘　　要：Lead-free relaxor ceramics(1−x)K_(0.5)Na_(0.5)NbO_(3)−xBi(Mn_(0.5)Ni_(0.5))O_(3)((1−x)KNN-xBMN)with considerable charge-discharge characteristics and energy storage properties were prepared by a solid state method.Remarkable,a BMN doping level of 0.04,0.96KNN-0.04BMN ceramic obtained good energy storage performance with acceptable energy storage density Wrec of 1.826 J/cm^(3) and energy storage efficiencyηof 77.4%,as well as good frequency stability(1-500 Hz)and fatigue resistance(1-5000 cycles).Meanwhile,a satisfactory charge-discharge performance with power density PD~98.90 MW/cm^(3),discharge time t0.9<70 ns and temperature stability(30-180°C)was obtained in 0.96KNN-0.04BMN ceramic.The small grain size(~150 nm)and the high polarizability of Bi3+are directly related to its good energy storage capacity.This work proposes a feasible approach for lead-free KNN-based ceramics to achieve high-energy storage and ultra-fast charge-discharge performance as well as candidate materials for the application of advanced high-temperature pulse capacitors.

关 键 词：K_(0.5)Na_(0.5)NbO_(3)ceramics MICROSTRUCTURE ultra-fast charge-discharge energy storage. 

分 类 号：TQ174[化学工程—陶瓷工业]