1. A flexible electrostatic kinetic energy harvester based on electret films of electrospun nanofibers
- Author
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Yingxian Lu, Philippe Basset, Yamin Leprince-Wang, Martine Capo-Chichi, Technische Universität Dresden = Dresden University of Technology (TU Dresden), Laboratoire de Physique des Matériaux Divisés et des Interfaces (LPMDI), Université Paris-Est Marne-la-Vallée (UPEM), Université Paris-Est Marne-la-Vallée (UPEM)-Centre National de la Recherche Scientifique (CNRS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)
- Subjects
Materials science ,Nanotechnology ,02 engineering and technology ,Kinetic energy ,7. Clean energy ,01 natural sciences ,Capacitance ,law.invention ,chemistry.chemical_compound ,Parylene ,law ,Diode bridge ,General Materials Science ,Electrical and Electronic Engineering ,Thin film ,ComputingMilieux_MISCELLANEOUS ,Civil and Structural Engineering ,010405 organic chemistry ,business.industry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Capacitor ,chemistry ,Mechanics of Materials ,Signal Processing ,Vibrator (electronic) ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] ,Optoelectronics ,Electret ,0210 nano-technology ,business - Abstract
This paper reports a paper-based electrostatic kinetic energy harvester (e-KEH) implementing multilayered electret films based on electrospun nanofibrous material. It is the first time that a fully flexible electret-based e-KEH is reported. The proposed electret, PVDF-PTFD nanofibrous covered by Parylene C, has a faster stabilization of surface potential than a planar thin film of Parylene C, and a higher stability of charge storage. With a maximum force of 0.5 N and a 3-layer electret, the device capacitance increases from 25 pF to 100 pF during a pressing operation. Working with the optimal resistive load of 16 MΩ, the device pressed manually delivers a peak instantaneous power up to 45.6 μW and an average energy of 54 nJ/stroke, corresponding to a peak instantaneous power density of 7.3 μWcm-2 and an average energy density of 8.6 nJcm-2/stroke. Within 450 manual strokes, a 10-nF capacitor is charged up to 8.5 V by the prototype through a full-wave diode bridge. On a 1-μF capacitor, the energy delivery of 9.9 nJ/stroke has been obtained with a 10 Hz pressing movement excited by a vibrator with a maximum force of 0.5 N.
- Published
- 2018