BaTiO_(3)-based ceramics with high energy storage density  

作　　者：Yang Li Ming-Yang Tang Zhong-Gang Zhang Qi Li Jing-Lei Li Zhuo Xu Gang Liu Fei Li 

机构地区：[1]Electronic Materials Research Lab,Key Lab of Education Ministry and State Key Laboratory for Mechanical Behavior of Materials,School of Electronic Science and Engineering,Xi’an Jiaotong University,Xi’an,710049,China [2]Laboratory of Micro/Nano Systems for Aerospace,Ministry of Education,Northwestern Polytechnical University,Xi’an,710072,China [3]School of Materials and Energy,Southwest University,Chongqing,400715,China

出　　处：《Rare Metals》2023年第4期1261-1273,共13页稀有金属（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2021YFB3800602);the National Nature Science Foundation of China-NSAF(No.52172129);the Natural Science Foundation of Shaanxi Province(Nos.2021GXLH-Z-025 and 2020JM-004);Beilin 2021 Applied Technology Research and Development Project(No.GX2118)。

摘　　要：BaTiO_(3)ceramics are difficult to withstand high electric fields,so the energy storage density is relatively low,inhabiting their applications for miniaturized and lightweight power electronic devices.To address this issue,we added Sr_(0.7)Bi_(0.2)TiO_(3)(SBT)into BaTiO_(3)(BT)to destroy the long-range ferroelectric domains.Ca^(2+)was introduced into BT-SBT in the form of CaTiO_(3)(CT),which has the effect of inhibiting the movement of A-site defects to reduce dielectric loss and refining the grains to increase the breakdown field strength.In addition,we have increased the density and grain uniformity of ceramics by repeated rolling of the green samples through the viscous polymer processing(VPP),to further increase the breakdown electric field.The BT-SBT-CT ceramics exhibit the high recoverable energy storage density of 4.0 J·cm^(-3)under electric field of 480 kV·cm^(-1).Its recoverable energy storage density varies by less than 8%in the temperature range of 30-150℃,indicating good temperature stability of the energy storage performance.In this work,the energy storage performance of barium titanate-based ceramics was greatly improved by transforming ferroelectrics into relaxor ferroelectrics and VPP method,which can bring new inspiration for the research of energy storage ceramics.

关 键 词：Barium titanate Energy storage Viscous polymer processing(VPP) 

分 类 号：TM221[一般工业技术—材料科学与工程] TQ174.1[电气工程—电工理论与新技术]