Annealing atmosphere-dependent capacitive energy storage
Electrostatic capacitors based on dielectrics with high energy density and efficiency are desired for modern electrical systems owing to their intrinsic fast charging-discharging speed and excellent reliability. The longstanding bottleneck is their relatively small energy density. Herein, we report...
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Published in | Rare metals Vol. 42; no. 5; pp. 1465 - 1471 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Beijing
Nonferrous Metals Society of China
01.05.2023
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Electrostatic capacitors based on dielectrics with high energy density and efficiency are desired for modern electrical systems owing to their intrinsic fast charging-discharging speed and excellent reliability. The longstanding bottleneck is their relatively small energy density. Herein, we report enhanced energy density and efficiency in the Aurivillius Pb
2
Bi
4
Ti
5
O
18
films by controlling the post-annealing atmosphere. The results demonstrate that the fabrication atmosphere has significant effects on the film texture and defects. As the increase of the oxygen pressure of annealing atmosphere, the Pb
2
Bi
4
Ti
5
O
18
films show a preferred growth orientation of (00
l
) and fewer defects, which leads to a higher polarization and breakdown field for the film annealed in air atmosphere and thus help to achieve an ultrahigh energy density of 59.4 J·cm
−3
and an improved efficiency of 81.2%. Moreover, the film also exhibits excellent cycling reliability and good thermal stability. The Pb
2
Bi
4
T
i5
O
18
films show a significant potential application for dielectric capacitors.
Graphical abstract |
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ISSN: | 1001-0521 1867-7185 |
DOI: | 10.1007/s12598-022-02225-5 |