Excellent energy storage performance of (ScTa) modified (BiNa)TiO-based ceramics modulated by the evolution of polar phases
To address the environmental pollution and energy crisis in the world, the next generation of advanced pulsed power capacitors has been developed rapidly in recent years, which require lead-free dielectric ceramics with excellent energy storage performance. Herein, we propose a strategy to optimize...
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Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 11; no. 26; pp. 14169 - 14179 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Published |
04.07.2023
|
Online Access | Get full text |
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Abstract | To address the environmental pollution and energy crisis in the world, the next generation of advanced pulsed power capacitors has been developed rapidly in recent years, which require lead-free dielectric ceramics with excellent energy storage performance. Herein, we propose a strategy to optimize the energy storage performance of (Bi
0.5
Na
0.5
)TiO
3
-based ceramics
via
exploring a high saturation polarization which could be modulated by the evolution of oxygen vacancies and local polar phases induced by chemical modification. A high saturation polarization could be maintained in (Sc
0.5
Ta
0.5
)
4+
doped (Bi
0.5
Na
0.5
)TiO
3
-0.30SrTiO
3
(BNST) ceramics, which is ascribed to the increased content of the rhombohedral phase with higher polarization anisotropy. Besides, the incorporation of (Sc
0.5
Ta
0.5
)
4+
also concurrently induces smaller-sized polar nano-regions and widens the band gap, thereby achieving a stronger relaxor state and larger breakdown electric field. As a result, an ultrahigh recoverable energy density
W
rec
of 12.2 J cm
−3
, an excellent efficiency
of 85.9%, and superior energy storage thermal stability (
W
rec
= 4.4 ± 0.1 J cm
−3
,
η
= 89.9 ± 0.9%, 20-140 °C) are obtained in the 20 mol% (Sc
0.5
Ta
0.5
)
4+
doped BNST ceramic. The present experimental and theoretical systematic studies provide a novel avenue and paradigm for the development of dielectric ceramic materials with ultrahigh energy storage properties.
An ultrahigh energy storage performance is achieved in the BNST-20% (Sc
0.5
Ta
0.5
)
4+
ceramic
via
chemical modification, which could induce the evolution of oxygen vacancies and local polar phases to achieve a high saturation polarization. |
---|---|
AbstractList | To address the environmental pollution and energy crisis in the world, the next generation of advanced pulsed power capacitors has been developed rapidly in recent years, which require lead-free dielectric ceramics with excellent energy storage performance. Herein, we propose a strategy to optimize the energy storage performance of (Bi
0.5
Na
0.5
)TiO
3
-based ceramics
via
exploring a high saturation polarization which could be modulated by the evolution of oxygen vacancies and local polar phases induced by chemical modification. A high saturation polarization could be maintained in (Sc
0.5
Ta
0.5
)
4+
doped (Bi
0.5
Na
0.5
)TiO
3
-0.30SrTiO
3
(BNST) ceramics, which is ascribed to the increased content of the rhombohedral phase with higher polarization anisotropy. Besides, the incorporation of (Sc
0.5
Ta
0.5
)
4+
also concurrently induces smaller-sized polar nano-regions and widens the band gap, thereby achieving a stronger relaxor state and larger breakdown electric field. As a result, an ultrahigh recoverable energy density
W
rec
of 12.2 J cm
−3
, an excellent efficiency
of 85.9%, and superior energy storage thermal stability (
W
rec
= 4.4 ± 0.1 J cm
−3
,
η
= 89.9 ± 0.9%, 20-140 °C) are obtained in the 20 mol% (Sc
0.5
Ta
0.5
)
4+
doped BNST ceramic. The present experimental and theoretical systematic studies provide a novel avenue and paradigm for the development of dielectric ceramic materials with ultrahigh energy storage properties.
An ultrahigh energy storage performance is achieved in the BNST-20% (Sc
0.5
Ta
0.5
)
4+
ceramic
via
chemical modification, which could induce the evolution of oxygen vacancies and local polar phases to achieve a high saturation polarization. |
Author | Feng, Wuwei Liu, Meitang He, Bin Ochirkhuyag, Tumentsereg Odkhuu, Dorj Bao, Zhidi Hu, Cheng Liu, Shuo Zhong, Yi |
AuthorAffiliation | Incheon National University Beijing Intelligent Coal Mine Company Limited China University of Geosciences National Laboratory of Mineral Materials School of Materials Science and Technology Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Department of Physics |
AuthorAffiliation_xml | – name: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes – name: Beijing Intelligent Coal Mine Company Limited – name: Incheon National University – name: School of Materials Science and Technology – name: National Laboratory of Mineral Materials – name: China University of Geosciences – name: Department of Physics – name: Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources |
Author_xml | – sequence: 1 givenname: Bin surname: He fullname: He, Bin – sequence: 2 givenname: Tumentsereg surname: Ochirkhuyag fullname: Ochirkhuyag, Tumentsereg – sequence: 3 givenname: Wuwei surname: Feng fullname: Feng, Wuwei – sequence: 4 givenname: Meitang surname: Liu fullname: Liu, Meitang – sequence: 5 givenname: Shuo surname: Liu fullname: Liu, Shuo – sequence: 6 givenname: Zhidi surname: Bao fullname: Bao, Zhidi – sequence: 7 givenname: Cheng surname: Hu fullname: Hu, Cheng – sequence: 8 givenname: Yi surname: Zhong fullname: Zhong, Yi – sequence: 9 givenname: Dorj surname: Odkhuu fullname: Odkhuu, Dorj |
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Title | Excellent energy storage performance of (ScTa) modified (BiNa)TiO-based ceramics modulated by the evolution of polar phases |
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