Prateek, P and Siddiqui, S and Bhunia, R and Singh, N and Garg, A and Gupta, RK (2020) Interface modulation in multi-layered BaTiO3nanofibers/PVDF using the PVP linker layer as an adhesive for high energy density capacitor applications. In: Materials Advances, 1 (4). pp. 680-688.
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Abstract
In this work, we have studied the role of a linker across the interface in a multi-layered polymer nanocomposite-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 single layered PVDF, single layered 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 the 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 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 the 1 vol% BPB device at ∼210 MV m-1, which is ∼400% higher than that of the 1 vol% BB device. The present work provides an important finding that interface engineering in a multi-layered polymer nanocomposite helps in making homogeneous interfaces and hence enhancing the energy density at much lower electric fields. Furthermore, this work will provide a new path to fabricate large-scale, low-cost, and highly efficient capacitors using a simple device fabrication method.
| Item Type: | Journal Article |
|---|---|
| Publication: | Materials Advances |
| Publisher: | Royal Society of Chemistry |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 23 Jan 2023 11:22 |
| Last Modified: | 23 Jan 2023 11:22 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79277 |
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