Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5458844 | Journal of Alloys and Compounds | 2017 | 7 Pages |
Abstract
The immense potential of dielectric capacitor for use in energy-storage applications has propelled much recent research and development. Here, we prepared a kind of lead-free ferroelectric thick films of Fe-doped (Na0.85K0.15)0.5Bi0.5TiO3 (NKBT-Fex, x = 0, 0.01, 0.02 and 0.04). The effects of Fe3+ contents on the microstructure, dielectric properties and energy-storage performances of NKBT thick films were studied in detail. The studies on complex impedance spectroscopic were also carried out for NKBT-Fe0.02 thick film at different temperature from 100 Hz to 1 MHz. By Fe doping, the leakage current of the NKBT-Fex thick films was greatly reduced, while the breakdown strength (BDS) and the difference between the maximum polarization and remanent polarization were enhanced. These characteristics lead to excellent energy-storage performances with good temperature and frequency stability. In particular, a maximum energy-storage density (W) of 33.3 J/cm3 with an efficiency (η) of 51.3% was achieved in the NKBT-Fe0.02 thick film. These results open up a promising feasible route to enhance the energy-storage performances by properly element doping.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jiaheng Wang, Yong Li, Ningning Sun, Qiwei Zhang, Liwen Zhang, Xihong Hao, Xiujian Chou,