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Issue 13, 2017
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Enhanced energy density of polymer nanocomposites at a low electric field through aligned BaTiO3 nanowires

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Abstract

In practical application, new dielectric capacitors with greater energy density at lower operating voltage will be promising candidates for high-performance electrical devices. Theoretically, it is possible to achieve large electric polarization at a low electric field via embedding aligned ferroelectric nanowires in a polymer matrix, which could release high energy density. However, in terms of practice, the design of nanocomposites with aligned nanowires poses a great technical challenge. Here, a new physical-assisted casting method was developed to tune the orientation of elongated BaTiO3 nanowires in a P(VDF-CTFE) matrix. In the Z-aligned nanocomposites, a large (DmaxPr) value of 9.93 μC cm−2 can be induced at a low electric field of 2400 kV cm−1 by aligning 3 vol% ferroelectric BaTiO3 nanowires in the poling direction. Compared with XY-aligned nanocomposites even at a high electric field of 3400 kV cm−1, the Z-aligned nanocomposites could exhibit simultaneously an enhanced energy density of 10.8 J cm−3 and a discharge efficiency of 61.4% at 2400 kV cm−1. To the best of our knowledge, among ferroelectric nanocomposites, this is the highest energy density ever obtained at such a low electric field. This work is of critical significance in making dielectric nanocomposites viable for energy storage devices in current electrical and electronic applications.

Graphical abstract: Enhanced energy density of polymer nanocomposites at a low electric field through aligned BaTiO3 nanowires

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Publication details

The article was received on 16 Jan 2017, accepted on 16 Feb 2017 and first published on 16 Feb 2017


Article type: Paper
DOI: 10.1039/C7TA00513J
Citation: J. Mater. Chem. A, 2017,5, 6070-6078
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    Enhanced energy density of polymer nanocomposites at a low electric field through aligned BaTiO3 nanowires

    B. Xie, H. Zhang, Q. Zhang, J. Zang, C. Yang, Q. Wang, M. Li and S. Jiang, J. Mater. Chem. A, 2017, 5, 6070
    DOI: 10.1039/C7TA00513J

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