纳米复合材料
材料科学
电介质
氮化硼
功率密度
静电纺丝
电容器
电场
光电子学
电荷密度
聚合物纳米复合材料
储能
聚合物
复合材料
纳米技术
电压
电气工程
功率(物理)
量子力学
物理
工程类
作者
Yi Zeng,Zhonghui Shen,Yang Shen,Yuanhua Lin,Ce‐Wen Nan
摘要
Flexible dielectric polymer films with high energy storage density and high charge-discharge efficiency have been considered as promising materials for electrical power applications. Here, we design hierarchical structured nanocomposite films using nonlinear polymer poly(vinylidene fluoride-HFP) [P(VDF-HFP)] with inorganic h-boron nitride (h-BN) nanosheets by electrospinning and hot-pressing methods. Our results show that the addition of h-BN nanosheets and the design of the hierarchical multilayer structure in the nanocomposites can remarkably enhance the charge-discharge efficiency and energy density. A high charge-discharge efficiency of 78% and an energy density of 21 J/cm3 can be realized in the 12-layered PVDF/h-BN nanocomposite films. Phase-field simulation results reveal that the spatial distribution of the electric field in these hierarchical structured films affects the charge-discharge efficiency and energy density. This work provides a feasible route, i.e., structure modulation, to improve the energy storage performances for nanocomposite films.
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