电介质
纳米复合材料
材料科学
纳米纤维
储能
复合材料
介电损耗
聚合物
介电常数
光电子学
物理
量子力学
功率(物理)
作者
Mengjia Feng,Qingguo Chi,Yu Feng,Yue Zhang,Tiandong Zhang,Changhai Zhang,Qingguo Chen,Qingquan Liu
标识
DOI:10.1016/j.compositesb.2020.108206
摘要
Large dielectric loss and low energy storage efficiency are common problems of poly(vinylidene fluoride) (PVDF) and its copolymers based energy storage dielectrics which has limited their applications. To solve these problems, linear dielectric polymethyl methacrylate (PMMA) with low intrinsic dielectric loss was chosen as the interlayers of P(VDF-TrFE-CFE) (PVTC) to form the multilayer structure dielectric. A small amount of silicon dioxide-coated Ba0.6Sr0.4TiO3 fibers ([email protected]2) were incorporated into the PVTC layer to compensate the polarization decreasing due to the introduction of PMMA. The results showed that the optimized multilayer structure can significantly improve the energy storage efficiency and has a positive impact on enhancing both breakdown strength and permittivity. An enhanced and acceptable efficiency (85%) with a high energy density (10 J/cm3) were achieved in the 0.5 vol% 9-layer aligned [email protected]2 PVTC/PMMA dielectric. This work can sever as a route to simultaneously obtain high energy storage density and efficiency in polymer based composites.
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