六氟丙烯
材料科学
电介质
储能
纳米复合材料
复合材料
电容器
聚合物
介电损耗
氟化物
共聚物
电压
光电子学
电气工程
化学
工程类
物理
功率(物理)
无机化学
量子力学
四氟乙烯
作者
V. Tomer,Evangelos Manias,Clive A. Randall
摘要
Poly(vinylidene fluoride) (PVDF) has generated interest for use in electrical energy storage, mostly due to its high dielectric constant compared to other polymers. There still exist challenges, such as its high energy losses, that have prevented large scale commercialization of PVDF-based capacitors, but progress is continuously being made. In this paper we explore a promising route to improve the energy storage performance of PVDF, through a synergy of HFP comonomers and of kaolinite clay nanofillers. This study shows that the addition of these high aspect ratio fillers to poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)] copolymers does not increase the polar phase and, consequently, these composites exhibit markedly enhanced dielectric properties at high electric fields. Specifically, strained films of these composites exhibit reduced high field losses, markedly increased breakdown strength and, thus, large recoverable energy density values, in the range of 19 J/cm3.
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