期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 869, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159366
关键词
NBT; Leakage current; Breakdown strength; Dielectric; Ferroelectricity; Energy storage
资金
- National Natural Science Foundation of China [11864028]
- Inner Mongolia Science Foundation [2018MS01003]
Lead-free perovskite-structured Na0.5Bi0.5TiO3 (NBT) thin films prepared by sol-gel technology exhibit good energy storage performance, with a recoverable energy density of 23.3 J/cm(3) and energy storage efficiency of 61.6%, making them promising for capacitors with high energy storage properties.
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 x 10(-3) A/cm(2) 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/cm(3) and an energy storage efficiency of 61.6%. Additionally, the NBT films had good fatigue resistance up to 1 x 10(7) charge-discharge cycles. The films may be expected to be used in capacitors with high energy storage properties. (C) 2021 Elsevier B.V. All rights reserved.
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