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Interface modulation in multi-layered BaTiO3 nanofibers/PVDF using PVP linker layer as adhesive for high energy density capacitor applications

Abstract

In this work, we have studied the role of linker across the interface in a multi-layered polymer nanocomposites-based capacitor using barium titanate (BT) nanofibers (NFs) as nanofillers and polyvinylidene fluoride (PVDF) as the polymer matrix. In a multi-layered device, the interface between the top and bottom layers is usually non-homogeneous and must be taken into consideration for high dielectric performance. The energy densities of a single layer PVDF, single layer 1 vol% BT NFs/PVDF (1 vol% B), and bi-layered 1 vol% BT/PVDF-BT/PVDF (1 vol% BB) were 1.8, ~2.0, and ~1.7 J cm-3, respectively at ~210 MV m-1. To clearly investigate the effect of interface between the top and bottom layers of BT NFs/PVDF films, a polyvinyl pyrrolidone (PVP) linker layer was incorporated in the middle layer of the device (BT NFs/PVDF-PVP-BT NFs/PVDF is abbreviated as BPB). The dielectric study revealed that the middle PVP adhesive layer plays a crucial role in tailoring the dielectric properties as the energy density was surprisingly enhanced to 8.7 J cm-3 for 1 vol% BPB device at ~210 MV m-1 which is ~400% higher than that of the 1 vol% BB device. The present work incites an important finding that the interface engineering in a multi-layered polymer nanocomposite helps in making the homogeneous interfaces and hence enhancing the energy density at much lower electric fields. Further, this work will provide a new path to fabricate large-scale, low-cost, and highly efficient capacitors using a simple device fabrication method.

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Supplementary files

Article information


Submitted
23 Apr 2020
Accepted
21 May 2020
First published
21 May 2020

This article is Open Access

Mater. Adv., 2020, Accepted Manuscript
Article type
Paper

Interface modulation in multi-layered BaTiO3 nanofibers/PVDF using PVP linker layer as adhesive for high energy density capacitor applications

P. Prateek, S. Siddiqui, R. Bhunia, N. Singh, A. Garg and R. K. Gupta, Mater. Adv., 2020, Accepted Manuscript , DOI: 10.1039/D0MA00240B

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