Enhanced dielectric tunability and energy storage density of sandwich-structured Ba0.6Sr0.4TiO3/PVDF composites

被引：39
作者：
Guo, Yiting [1 ]
Wu, Sichen [1 ]
Liu, Shuhang [1 ]
Xu, Jie [1 ]
Pawlikowska, Emilia [2 ]
Szafran, Mikolaj [3 ]
Rydosz, Artur [4 ]
Gao, Feng [1 ]
机构：
[1] Northwestern Polytech Univ, NPU QMUL Joint Res Inst Adv Mat & Structures JRI, MIIT Key Lab Radiat Detect Mat & Device,Sch Mat S, State Key Lab Solidificat Proc,USI Inst Intellige, Xian 710072, Shaanxi, Peoples R China
[2] Polish Acad Sci, Inst High Pressure Phys, PL-05092 Warsaw, Poland
[3] Warsaw Univ Technol, Fac Chem, Noakowskiego 3, PL-00664 Warsaw, Poland
[4] AGH Univ Sci & Technol, Dept Elect, Mickiewicza 30, PL-30059 Krakow, Poland
来源：
MATERIALS LETTERS | 2022年 / 306卷
基金：
中国国家自然科学基金;
关键词：
Composite materials; Multilayer structure; Ba0.6Sr0.4TiO3/PVDF; Energy storage density; Dielectric tunability; BA0.6SR0.4TIO3/POLY(VINYLIDENE FLUORIDE) COMPOSITES; NANOCOMPOSITES; CONSTANT; FILMS;
D O I：
10.1016/j.matlet.2021.130910
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The regional distribution of fillers can change the distribution of electric field in the ceramic/polymer composites and further affect the dielectric properties. Here, Ba0.6Sr0.4TiO3/PVDF (BST/PVDF) monolayer and its two kinds of sandwich structural composites, PVDF BST/PVDF PVDF (PBP) and BST/PVDF PVDF BST/PVDF (BPB), were fabricated using solution casting method combined hot pressing process. The results showed BPB structural composite possesses the best dielectric performances with a relative permittivity of 17.3, an energy density (U-e) of 10.54 J/cm(3) which is 2 times of BST/PVDF monolayer composite with the same BST content, as well as a dielectric tunability of 83.33%. Finite element simulation further proves that sandwich structure, especially BPB structure, can reduce the occurrence of electrical breakdown in the composite, and improve the energy storage characteristics and dielectric tunability. This work gives new thinking for the development of energy storage thin-film composites.
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页数：4
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