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High-energy-density with polymer nanocomposites containing of SrTiO3 nanofibers for capacitor application

Inorganic/polymer nanocomposite films have attracted pronounced attention for electric energy storage applications since their high power energy density and fast charge-discharge ability. In this work, the flexible nanocomposite films composed by the paraelectric SrTiO3 nanofibers (ST NFs) and poly(vinylidene fluoride) (PVDF) were prepared by a solution cast method. The ST NFs, synthesized by an electrospinning method, were coated with a dense and robust dopamine layer which could effectively improve the filler-matrix distributional homogeneity and compatibility. The composite film with an optimized filler content illustrates a high discharge energy density of 9.12?J/cm3 at 360?MV/m, which is about 625% over the biaxially oriented polypropylenes (BOPP) (1.2?J/cm3 at 640?MV/m). Moreover, the composite film shows a superior power density of 2.31?MW/cm3 and ultra-fast discharge speed of 178?ns. Therefore, the present approach might be extended to the fabrication of similar polymeric nanocomposites for high-performance capacitor energy storage devices.

» Author: Lingmin Yao, Zhongbin Pan, Jiwei Zhai, Guangzu Zhang, Zhiyu Liu, Yuhua Liu

» Reference: Composites Part A: Applied Science and Manufacturing, Volume 109

» Publication Date: 01/06/2018

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [609149].

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