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Simultaneously enhanced discharge energy density and efficiency in nanocomposite films capacitors utilizing two-dimensional NaNbO3@Al2O3 platelets

Abstract

With the rapid development of the consumer electronics market, electrostatic capacitors need to store as much energy as possible in a rather restricted space. In this work, the nanocomposite films combining two-dimensional core-shell NaNbO3@Al2O3 platelets (2D NN@AO Ps) and poly(vinylidene-fluoride hexafluoropropylene) (P(VDF-HFP)), featuring with excellent energy-storage capability, high efficiency, and ultrafast discharge performance, are designed and fabricated. Both the experimental results and finite element simulation confirm the superiority of the 2D NN@AO Ps nanocomposite films in improving the breakdown strength (Eb) and energy-storage capability. Especially, the introduction of 3 vol% 2D NN@AO Ps results in much enhanced discharge energy density of 14.59 J/cm3 and outstanding discharge efficiency of 70.1% in NN@AO Ps/P(VDF-HFP) nanocomposite films, much greater than pure P(VDF-HFP) (7.74 J/cm3). The corresponding nanocomposite films exhibit excellent reliability in energy storage performance by consecutive cycling. Therefore, this research could bring the polymer nanocomposites into a new chapter of study and application of energy storage dielectric capacitors.

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Supplementary files

Publication details

The article was received on 28 Jan 2019, accepted on 06 May 2019 and first published on 06 May 2019


Article type: Paper
DOI: 10.1039/C9NR00874H
Nanoscale, 2019, Accepted Manuscript

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    Simultaneously enhanced discharge energy density and efficiency in nanocomposite films capacitors utilizing two-dimensional NaNbO3@Al2O3 platelets

    Z. Pan, Q. Ding, L. Yao, S. Huang, S. Xin, J. Liu, J. Chen and J. Zhai, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C9NR00874H

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