Enhanced energy-storage performance with optimized thermally stable dielectric property in BNT–BST ceramics modified by KNN doping  

作　　者：Shurong Li Chenglong Zhang Suzhi Li Le Zhang Haijun Wu 

机构地区：[1]State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University,710049,Xi’an,P.R.China [2]School of Physics,Xi’an Jiaotong University,710049,Xi’an,P.R.China

出　　处：《Journal of Advanced Dielectrics》2024年第3期27-32,共6页先进电介质学报（英文）

基　　金：support from the National Key R&D Program of China(2021YFB3201100);the National Natural Science Foundation of China(52172128).

摘　　要：Developing environmental-friendly materials with high-density energy storage is of paramount importance to meet the burgeoning demands for energy storage.In this study,we harness the modulation of a multicomponent solid solution by introducing KNN as a third element into the BNT–BST system,thereby achieving a marked enhancement in both energy storage performance and the temperature stability of the dielectric constant.BNBST–4KNN stands out for its exceptional dielectric stability,with a dielectric constant variation rate within 10%across a broad temperature range of 40℃to 400℃,a feat attributed to the flattening and broadening of the Tm peak.BNBT–2KNN exhibits superior energy storage capabilities,with an energy storage density of 1.324 J/cm^(3)and an energy storage efficiency of 72.3%,a result of the P–E loop becoming more slender.These advancements are pivotal for the sustainable progression of energy storage technologies.

关 键 词：BNT energy storage DIELECTRIC 

分 类 号：TM28[一般工业技术—材料科学与工程]