ORIGINAL RESEARCH article
Front. Mater.
Sec. Energy Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1570397
This article is part of the Research TopicFlexible Energy Materials and DevicesView all articles
Flexible Piezoelectric Energy Harvester Based on Self-Poled Electroactive P(VDF-HFP)/(Fe2O3-PANI) Composite Film
Provisionally accepted
- 1Department of Physics, University of North Bengal, Siliguri, India
- 2Department of Chemistry, University of North Bengal, Siliguri, West Bengal, India
- 3CentraleSupélec, Université Paris-Saclay, Gif sur Yvette, Île-de-France, France
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Fabricating a piezoelectric generator for harvesting mechanical energy is a recent development that has exhibited great potential to enhance the piezoelectric coefficient, stretchability, flexibility, and integrability in small-scale (i.e., micro or nano) power supply and sensor systems for diverse applications. In this study, we report on the preparation of a polymer composite P(VDF-HFP)/(Fe2O3-PANI) film i.e., ('hfp-f e -p n ') fabricated by incorporating Ferric oxide (Fe2O3) and Polyaniline (PANI) fillers with the host Poly(vinylidene fluoride-co-hexafluoropropylene)[P(VDF-HFP)] copolymer that yields more than 99% electroactive βand γ-phases formation where a traditional electrical poling treatment was avoided. The nucleation and enhancement in the piezoelectric phase (i.e., β-phase) and the conversion of the degree of crystallinity (χ c ) in the P(VDF-HFP) copolymer is governed by the incorporation of those fillers as revealed by the Attenuated total reflectance (ATR) and X-ray diffraction (XRD) analyses. Furthermore, the electrostatic interactions between the surface charges of Fe2O3 and the interfacial dipole-dipole interaction of (=N-H) + group and -CH2-/-CF2-molecular dipoles in P(VDF-HFP) cooperate to stabilize the electro-active phases and enhance its piezoelectric properties. Piezoelectric generator (PEG) fabricated with the 'hfp-f e -p n ' film shows an open circuit voltage output of ~8 V and output power of 10.3 nW. Also, it generates enough power to turn on commercial white/red light-emitting diodes (LEDs) instantly. The capacitor charging capability of the PEG indicates its suitability in effectively harvesting the mechanical energy from finger impact (a pressure amplitude of ~14 kPa) and as an alternative in the area of self-powered energy harvesting devices.
Keywords: β-Phase, piezoelectricity, P(VdF-HFP), Fe2O3, and PANI
Received: 03 Feb 2025; Accepted: 23 Apr 2025.
Copyright: © 2025 Barman, Ali, Roy, Roy, Garain and ADHIKARY. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: PRAKRITI ADHIKARY, Department of Physics, University of North Bengal, Siliguri, India
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