Simultaneous enhancement of energy storage performance and thermal stability of NaNbO_(3)-based ceramics via multi-scale modulation  

作　　者：Peng Nong Dafu Zeng Yue Pan Qinpeng Dong Mingzhao Xu Xiang Wang Jiaming Wang Huanfu Zhou Xu Li Xiuli Chen 

机构地区：[1]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》2024年第3期670-681,共12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);Guilin University of Technology Research Startup Project(No.GUTQDJJ2023029);High Level Innovation Team and Outstanding Scholar Program of Guangxi Institutes.

摘　　要：More and more attention is being paid to the environmental friendliness of the dielectric capacitors,which have a rapid charging and discharging speed and steady operation.However,the low recoverable energy storage density(W_(rec))limits the practical application of dielectric capacitors in solid-state energy storage devices.In this paper,(1-x)(0.92NaNbO_(3)-0.08Bi(Mg_(0.5)Ti_(0.5)O_(3))-xSrTiO_(3))(x=0.05,0.10,0.15,0.20)energy storage ceramics were fabricated based on various strategies such as nanodomain engineering,component and grain size optimization.Thus excellent energy storage performance(W_(rec)~6.0 J/cm^(3),η~81.0%)was obtained in NN-BMT-0.15ST.SrTiO_(3)could enhance the internal disorder,improve the relaxation properties and increase the breakdown field strength of ceramics.Signifi-cantly domain relaxor behavior,as evidenced by Vogel-Fulcher(V-F)model,provides strong evidence for restraining early polarization saturation.In addition,Pulse charge/discharge tests have illustrated that the sample has excellent and stable charge/discharge performance(CD~1,068.9 A/cm^(2),PD~96.1 MW/cm^(3),t0.9 z 0.99 ms)It is concluded that there is a huge prospect of NN-BMT-0.15ST ceramics as a kind of pulsed-power-storing electronics.

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

分 类 号：TQ174.1[化学工程—陶瓷工业]