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Ternary PVDF-based terpolymer nanocomposites with enhanced energy density and high power density
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2018-03-13 , DOI: 10.1016/j.compositesa.2018.03.019
Feihua Liu , Qi Li , Zeyu Li , Lijie Dong , Chuanxi Xiong , Qing Wang

The development of advanced dielectric materials with high electric energy densities is of crucial importance in modern electronics and electric power systems. Herein, a kind of ternary poly(vinylidene fluoride)-based ferroelectric terpolymer nanocomposites are prepared using a facile solution cast method. The ternary nanocomposite that is composed of barium strontium titanate (BST) and boron nitride nanosheets (BNNS) can achieve increased dielectric constant and breakdown strength simultaneously. At the optimized filler contents, the ternary nanocomposite discharges an energy density of 24.4 J/cm3, which is 295% that of pristine terpolymer. Moreover, microsecond discharge speed of 2.81 μs along with a power density that is over 13 times that of the current commercial available biaxially oriented polypropylene (BOPP) have been achieved under an electric field of 200 MV/m. The incorporation of uniformly dispersed multicomponents into polymer matrix paves a way to significantly improve energy storage capability for dielectric polymer nanocomposites film capacitors.



中文翻译:

具有增强的能量密度和高功率密度的基于三元PVDF的三元共聚物纳米复合材料

具有高电能密度的高级介电材料的开发在现代电子和电力系统中至关重要。在此,使用简便的溶液流延法制备一种三元聚偏二氟乙烯系铁电三元共聚物纳米复合材料。由钛酸钡锶(BST)和氮化硼纳米片(BNNS)组成的三元纳米复合材料可以同时实现更高的介电常数和击穿强度。在优化的填料含量下,三元纳米复合材料的能量密度为24.4 J / cm 3,是原始三元共聚物的295%。此外,在200 MV / m的电场下,已经实现了2.81μs的微秒放电速度以及超过当前市售双轴取向聚丙烯(BOPP)的功率密度的13倍的功率密度。将均匀分散的多组分掺入聚合物基质中,为显着提高介电聚合物纳米复合薄膜电容器的储能能力铺平了道路。

更新日期:2018-03-13
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