Simultaneously achieving ultrahigh energy storage density and energy efficiency in barium titanate based ceramics

被引：112

作者：

Chen, Xiuli ^{[1
]}

Li, Xu ^{[1
]}

Sun, Jie ^{[1
]}

Sun, Congcong ^{[1
]}

Shi, Junpeng ^{[1
]}

Pang, Feihong ^{[1
]}

Zhou, Huanfu ^{[1
]}

机构：

[1] Guilin Univ Technol, Collaborat Innovat Ctr Explorat Hidden Nonferrous, Sch Mat Sci & Engn, Key Lab Nonferrous Mat & New Proc Technol,Minist, Guilin 541004, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 03期

关键词：

BaTiO3-based; Dielectric properties; Energy storage; LEAD-FREE CERAMICS; RELAXOR FERROELECTRIC CERAMICS; LOW DIELECTRIC LOSS; THERMAL-STABILITY; PHASE EVOLUTION; EXCELLENT STABILITY; MICROSTRUCTURE; CAPACITORS; TEMPERATURE; PERMITTIVITY;

D O I：

10.1016/j.ceramint.2019.09.265

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

BaTiO3-BiMeO3 (Me represent trivalent or average trivalent metallic ions) lead-free relaxor ferroelectrics have been demonstrated to be excellent candidates for dielectrics in pulsed power capacitor applications. However, the recoverable energy density (U-rec) needs to be further improved to fulfil the demands of miniaturization and integration in electronic devices. In this work, an ultrahigh U-rec of 3.282 J/cm(3) was obtained in (1-x)BaTiO3-xBi (Mg2/3Ta1/3)O-3 (xBMT) (x = 0.12) lead-free ceramics. The significantly enhanced U-rec was first reported in BT-based bulk ceramics. Meanwhile, all components exhibit ultrahigh energy storage efficiency (eta) of 93% under a strong electric field (>= 300 kV/cm), which may be attributed to the low leakage current caused by the introduction of Ta ions. In addition, excellent temperature, frequency and fatigue stabilities (variation of U-rec < 9% over 25-140 degrees C, U-rec > 2 J/cm(3) in 1-100 Hz and U-rec < 2% after 10(4) cycles) can be observed. These results demonstrate that 0.12BMT relaxor ferroelectrics can be considered a promising lead-free material for application in pulsed power systems.

引用

页码：2764 / 2771

页数：8

共 47 条

[1] Ultrafine core-shell BaTiO3@SiO2 structures for nanocomposite capacitors with high energy density [J].