Effect of BaTiO3 nanowire distribution on the dielectric and energy storage performance of double-layer PVDF-based composites

被引:61
作者
Feng, Yu [1 ,2 ]
Li, Jia-Long [1 ]
Li, Wei-Li [2 ,3 ]
Li, Meng-Lu [2 ]
Chi, Qing-Guo [1 ]
Zhang, Tian-Dong [1 ]
Fei, Wei-Dong [2 ,4 ]
机构
[1] Harbin Univ Sci & Technol, Key Lab Engn Dielect & Its Applicat, Minist Educ, Harbin 150080, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
[3] Harbin Inst Technol, Natl Key Lab Sci & Technol Precis Heat Proc Met, Harbin 150001, Heilongjiang, Peoples R China
[4] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China
基金
黑龙江省自然科学基金; 中国博士后科学基金; 中国国家自然科学基金;
关键词
PVDF; BaTiO3; nanowires; Dielectric; Energy storage; POLY(VINYLIDENE FLUORIDE) COMPOSITES; BETA-PHASE; INTERFACIAL POLARIZATION; POLYMER COMPOSITES; BREAKDOWN STRENGTH; DENSITY; FABRICATION; NANOCOMPOSITES; FILMS; CONDUCTIVITY;
D O I
10.1016/j.compositesa.2019.105524
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of novel double-layer PVDF-based composites filled with different concentration of BaTiO3 nanowire were fabricated employing hot-pressing process. The effects of various BT-NWs concentrations in isolated layers on the dielectric properties, energy storage density of the composites were investigated. The experimental dielectric constants of double-layer composites are lower than expected. The breakdown strength (E-b) of double-layer composites was obtained in the experiment, and predicted via capacitance series formula (CSF) and finite element analysis (FEA). Results show that the data predicted by FEA are closer to the experimental values. Compared with dielectric constant, the enhancement of E-b induced by double-layer structure is more significant for the energy storage performance of composites. A design route including E-b measurement of single-layer composites, E-b prediction of double-layer composites via FEA, selection of single-layer material and composites fabrication is proposed to prepare the multi-layer composites with excellent dielectric properties and energy storage.
引用
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页数:9
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