Issue 20, 2022

Multiferroic BiFeO3-based hydrophobic polymer composites for polarization rationalization-induced piezo-tribo hybrid energy harvesting and versatile self-powered mechanosensing

Abstract

BiFeO3-poly(vinylidene fluoride) (BFO-PVDF) and BiFO3-polydimethylsiloxane (BFO-PDMS) piezoelectric composite films have been fabricated herein and used to develop flexible piezoelectric-triboelectric hybrid nanogenerators by forming different combinations with aluminium (Al) electrodes (PVDF-Al, PDMS-Al and PDMS-PVDF) using the contact-separation mode. The dielectric permittivity of both the PVDF- and PDMS-based composites has been found to increase from ∼9 and 3.2 for a filler loading of 3 wt% to ∼16.6 and 4.7, respectively, for 10 wt% BFO concentration within their matrix. The mechanical stimulus-driven output voltage has also been found to be increased from ∼7.5 V and 35 V to ∼18 V and 100 V for the respective films. The rational augmentation of the polarization of PVDF and PDMS induced by the gradually increased BFO filler concentration in their matrix, as confirmed from the above-mentioned results, have been found to significantly affect the output performance of the fabricated piezo-tribo hybrid nanogenerators. Among the three types of fabricated hybrid devices, the combination of 10 wt% BFO-incorporated PDMS with an aluminium electrode shows the best output performance both theoretically and experimentally. Hence, this combination has been used to develop a flexible multi-unit hybrid nanogenerator (M-HNG), which shows further performance enhancement (output power density: ∼600 μW cm−2). The M-HNG was then used for biomechanical energy harvesting, powering small electronics and different self-powered mechanosensing applications including motion sensing, pressure sensing, water drop counting and phonation monitoring.

Graphical abstract: Multiferroic BiFeO3-based hydrophobic polymer composites for polarization rationalization-induced piezo-tribo hybrid energy harvesting and versatile self-powered mechanosensing

Supplementary files

Article information

Article type
Paper
Submitted
10 Jul 2022
Accepted
05 Sep 2022
First published
06 Sep 2022

Sustainable Energy Fuels, 2022,6, 4652-4668

Multiferroic BiFeO3-based hydrophobic polymer composites for polarization rationalization-induced piezo-tribo hybrid energy harvesting and versatile self-powered mechanosensing

A. Sasmal, A. Patra, S. Maity, S. Pratihar and S. Sen, Sustainable Energy Fuels, 2022, 6, 4652 DOI: 10.1039/D2SE00947A

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