Hydroxylated BiFeO3as efficient fillers in poly(vinylidene fluoride) for flexible dielectric, ferroelectric, energy storage and mechanical energy harvesting application

Sasmal, A and Patra, A and Devi, PS and Sen, S (2021) Hydroxylated BiFeO3as efficient fillers in poly(vinylidene fluoride) for flexible dielectric, ferroelectric, energy storage and mechanical energy harvesting application. In: Dalton Transactions, 50 (5). pp. 1824-1837.

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Abstract

Here we report the effect of surface hydroxylation of BiFeO3fillers on the dielectric, ferroelectric, energy storage and mechanical energy harvesting performance of poly(vinylidene fluoride). Surface hydroxylation helped to improve the interfacial interaction between the filler and PVDF matrix by introducing a strong hydrogen bonding between the -OH group of the hydroxylated BiFeO3filler surface and the -CF2dipole of PVDF in place of electrostatic interfacial interaction between non-hydroxylated BiFeO3and the -CH2dipole of PVDF. The amount of polar phase increased to around 91 for a 7 wt hydroxylated BiFeO3loaded PVDF film (7BFOH) by this new type of interfacial interaction. The dielectric, ferroelectric, energy storage and mechanical energy harvesting performance of the PVDF based composite films also improved by the above said technique. Upon repeated human finger tapping, the 7BFOH film delivered �18 V output peak to peak open circuit ac voltage (VOC). After rectification, theVOCof the 7BFOH film was able to charge a 10 μF capacitor up to �3 V which was able to light up some LEDs (connected in parallel) together instantaneously, which proved the real life applicability of the composite films in low power consuming self-powered electronic devices. © The Royal Society of Chemistry 2021.

Item Type:	Journal Article
Publication:	Dalton Transactions
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright of this article belongs to Royal Society of Chemistry
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	05 Mar 2021 10:24
Last Modified:	05 Mar 2021 10:24
URI:	http://eprints.iisc.ac.in/id/eprint/68098

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