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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202310559
|2 doi
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|a pubmed25n1218.xml
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|a (DE-627)NLM365755567
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|a (NLM)38084796
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|a DE-627
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|e rakwb
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|a eng
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|a Gao, Yangfei
|e verfasserin
|4 aut
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|a Ultrahigh Energy Storage in Tungsten Bronze Dielectric Ceramics Through a Weakly Coupled Relaxor Design
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 14.03.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Dielectric energy-storage capacitors, known for their ultrafast discharge time and high-power density, find widespread applications in high-power pulse devices. However, ceramics featuring a tetragonal tungsten bronze structure (TTBs) have received limited attention due to their lower energy-storage capacity compared to perovskite counterparts. Herein, a TTBs relaxor ferroelectric ceramic based on the Gd0.03 Ba0.47 Sr0.485-1.5 x Smx Nb2 O6 composition, exhibiting an ultrahigh recoverable energy density of 9 J cm-3 and an efficiency of 84% under an electric field of 660 kV cm-1 is reported. Notably, the energy storage performance of this ceramic shows remarkable stability against frequency, temperature, and cycling electric field. The introduction of Sm3+ doping is found to create weakly coupled polar nanoregions in the Gd0.03 Ba0.47 Sr0.485 Nb2 O6 ceramic. Structural characterizations reveal that the incommensurability parameter increases with higher Sm3+ content, indicative of a highly disordered A-site structure. Simultaneously, the breakdown strength is also enhanced by raising the conduction activation energy, widening the bandgap, and reducing the electric field-induced strain. This work presents a significant improvement on the energy storage capabilities of TTBs-based capacitors, expanding the material choice for high-power pulse device applications
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|a Journal Article
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|a dielectric capacitors
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|a energy storage
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|a relaxor ferroelectrics
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|a tetragonal tungsten bronze structure
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|a Qiao, Wenjing
|e verfasserin
|4 aut
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| 700 |
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|a Lou, Xiaojie
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Song, Zizheng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhu, Xiaopei
|e verfasserin
|4 aut
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|a He, Liqiang
|e verfasserin
|4 aut
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|a Yang, Bian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hu, Yanhua
|e verfasserin
|4 aut
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| 700 |
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|a Shao, Jinyou
|e verfasserin
|4 aut
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|a Wang, Danyang
|e verfasserin
|4 aut
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|a Chen, Zibin
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Shujun
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 11 vom: 12. März, Seite e2310559
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
1 |
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|g volume:36
|g year:2024
|g number:11
|g day:12
|g month:03
|g pages:e2310559
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|u http://dx.doi.org/10.1002/adma.202310559
|3 Volltext
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