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Polymers 2018, 10(12), 1349; https://doi.org/10.3390/polym10121349

Improved Energy Storage Performance of Linear Dielectric Polymer Nanodielectrics with Polydopamine coated BN Nanosheets

1
Department of Materials Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Material Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
2
Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, No. 127 Youyi West Road, Xi’an 710072, China
*
Author to whom correspondence should be addressed.
Received: 15 November 2018 / Revised: 2 December 2018 / Accepted: 4 December 2018 / Published: 5 December 2018
(This article belongs to the Special Issue Multi-functional Polymer Composites and Structures)
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Abstract

Polymer-based nanodielectrics have been intensively investigated for their potential application as energy storage capacitors. However, their relatively low energy density (Ue) and discharging efficiency (η) may greatly limit their practical usage. In present work, high insulating two-dimensional boron nitride nanosheets (BNNS), were introduced into a linear dielectric polymer (P(VDF-TrFE-CTFE)-g-PMMA) matrix to enhance the energy storage performance of the composite. Thanks to the surface coating of polydopamine (PDA) on BN nanosheets, the composite filled with 6 wt% coated BNNS (mBNNS) exhibits significantly improved breakdown strength (Eb) of 540 MV/m and an energy density (Ue) of 11 J/cm3, which are increased by 23% and 100%, respectively as compared with the composite filled with the same content of pristine BNNS. Meanwhile, η of both composites is well retained at around 70% even under a high voltage of 400 MV/m, which is superior to most of the reported composites. This work suggests that complexing polymer matrix with linear dielectric properties with surface coated BNNS fillers with high insulating 2D structure might be a facile strategy to achieve composite dielectrics with simultaneously high energy density and high discharging efficiency. View Full-Text
Keywords: PVDF-based polymers; linear dielectric; polydopamine; BN nanosheets; energy density; discharging efficiency PVDF-based polymers; linear dielectric; polydopamine; BN nanosheets; energy density; discharging efficiency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wang, J.; Xie, Y.; Liu, J.; Zhang, Z.; Zhuang, Q.; Kong, J. Improved Energy Storage Performance of Linear Dielectric Polymer Nanodielectrics with Polydopamine coated BN Nanosheets. Polymers 2018, 10, 1349.

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