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Superior discharged energy density and efficiency in polymer nanocomposites induced by linear dielectric core-shell nanofibers

Abstract

For superior performance capacitors, large energy density along with high discharged efficiency, high power density, and ultrafast charging/discharging speed are desired. Herein, we design and prepare newly high quality nanocomposite films containing of linear dielectric core-shell SrTiO3@Al2O3 nanofibers (ST@AO NFs) and poly(vinylidene fluoride) (PVDF) demonstrating remarkable energy storage performance. The experimental and finite element simulations results suggest that the amorphous AO incorporation into between the ST NFs and PVDF matrix could effectively improve electric field strength, electric potential distribution, and current density of nanocomposite films, resulting in greatly enhancing discharge energy density and efficiency. More importantly, the nanocomposite films loading with 5 vol.% ST@AO NFs shows outstanding discharge energy density performance with 15.3 J cm-3 at 475 MV m-1 and maintains a high discharge efficiency of 68.52 %. Moreover, the corresponding nanocomposite films illustrate an ultra-fast discharge rate of 127 ns. The promising overall dielectric properties offer a new insight into the development of next-generation dielectric capacitor materials.

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Publication details

The article was received on 09 Sep 2018, accepted on 25 Nov 2018 and first published on 28 Nov 2018


Article type: Paper
DOI: 10.1039/C8TC04555K
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Superior discharged energy density and efficiency in polymer nanocomposites induced by linear dielectric core-shell nanofibers

    Z. Pan, L. Yao, J. Liu, X. Liu, F. Pi, J. Chen, B. Shen and J. Zhai, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC04555K

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