Good energy storage properties of Na0.5Bi0.5TiO3 thin films

被引：0
|
作者：
Wang, Fang [1 ]
Zhu, Cong [2 ]
Zhao, Shifeng [1 ]
机构：
[1] School of Physical Science and Technology, Inner Mongolia University, Hohhot,010021, China
[2] Wuhan Institute of Marine Electric Propulsion, Wuhan,430064, China
来源：
Journal of Alloys and Compounds | 2021年 / 869卷
基金：
中国国家自然科学基金;
关键词：
Electric breakdown - Perovskite - Sol-gels - Leakage currents - Ferroelectric films - Thin films - Bismuth compounds - Dielectric losses - Sodium compounds - Perovskite solar cells;
D O I：
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摘要：
Lead-free perovskite-structured single-phase Na0.5Bi0.5TiO3 (NBT) thin films were successfully prepared by a sol-gel technology. The films exhibited a leakage current density of about 3.1 × 10−3 A/cm2 under an electric field of 500 kV/cm and their characteristic breakdown strength was 1250.49 kV/cm. At a frequency of 1 kHz, the dielectric constant and dielectric loss of the NBT films were 405 and 0.029. These films achieved good energy storage performance under an electric field of 1200 kV/cm, i.e., a recoverable energy density of 23.3 J/cm3 and an energy storage efficiency of 61.6%. Additionally, the NBT films had good fatigue resistance up to 1 × 107 charge-discharge cycles. The films may be expected to be used in capacitors with high energy storage properties. © 2021 Elsevier B.V.
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