Electrostatic energy storage performances of La(Ni 2/3 Ta 1/3 )O 3 ‐modified Na 0.5 Bi 0.5
Electrostatic energy storage performances of La(Ni 2/3 Ta 1/3 )O 3 ‐modified Na 0.5 Bi 0.5
复制标题
DOI：
10.1111/jace.18977
复制
发表时间：
2023-01
影响因子：
3.9
通讯作者：
Nan Weng;Ji Zhang;Jiajia Wang;Tianze Pan;Jing Wang;Yaojin Wang
中科院分区：
文献类型：
--
作者：
Nan Weng;Ji Zhang;Jiajia Wang;Tianze Pan;Jing Wang;Yaojin Wang
Ceramic capacitors with high electrostatic energy storage performances have captured much research interest in latest years. Sodium bismuth titanate (Na0.5Bi0.5TiO3)‐based ferroelectric ceramics show great potential due to their environment‐friendly composition, high polarization, and excellent relaxor properties. However, the nonergodic relaxor state of Na0.5Bi0.5TiO3‐based ceramics hampers the decrement of remanent polarization, leading to poor energy storage performance. Herein, the (1 −x)Na0.5Bi0.5TiO3–xLa(Ni2/3Ta1/3)O3ceramics were designed to generate the transformation between nonergodic and ergodic relaxor state. As a result, the ceramics exhibit improved dielectric relaxation, slim polarization–electric field loops, and flattened current–electric field curves due to highly dynamic polar nanoregions. Particularly, the 0.85Na0.5Bi0.5TiO3–0.15La(Ni2/3Ta1/3)O3ceramics show large breakdown electric fieldEb(345 kV/cm), high recoverable energy densityWrec(3.6 J/cm3), and efficiencyη(80.6%), revealing potential applications in electrostatic energy storage.
