Lead‐Free Perovskite Nanowire‐Employed Piezopolymer for Highly Efficient Flexible Nanocomposite Energy Harvester

In the past two decades, mechanical energy harvesting technologies have been developed in various ways to support or power small‐scale electronics. Nevertheless, the strategy for enhancing current and charge performance of flexible piezoelectric energy harvesters using a simple and cost‐effective pr...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2018-05, Vol.14 (19), p.e1704022-n/a
Main Authors: Jeong, Chang Kyu, Baek, Changyeon, Kingon, Angus I., Park, Kwi‐Il, Kim, Seung‐Hyun
Format: Article
Language:English
Subjects:
Barium titanates
BaTiO3 nanowires
Biocompatibility
Biomechanics
Electronics
Energy consumption
Energy harvesting
Finite element method
flexible
Harvesters
Human motion
hybrid nanocomposites
Nanocomposites
Nanotechnology
Nanowires
piezoelectric copolymers
Piezoelectricity
Vinylidene
Vinylidene fluoride
Wearable technology
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Summary:In the past two decades, mechanical energy harvesting technologies have been developed in various ways to support or power small‐scale electronics. Nevertheless, the strategy for enhancing current and charge performance of flexible piezoelectric energy harvesters using a simple and cost‐effective process is still a challenging issue. Herein, a 1D–3D (1‐3) fully piezoelectric nanocomposite is developed using perovskite BaTiO3 (BT) nanowire (NW)‐employed poly(vinylidene fluoride‐co‐trifluoroethylene) (P(VDF‐TrFE)) for a high‐performance hybrid nanocomposite generator (hNCG) device. The harvested output of the flexible hNCG reaches up to ≈14 V and ≈4 µA, which is higher than the current levels of even previous piezoceramic film‐based flexible energy harvesters. Finite element analysis method simulations study that the outstanding performance of hNCG devices attributes to not only the piezoelectric synergy of well‐controlled BT NWs and within P(VDF‐TrFE) matrix, but also the effective stress transferability of piezopolymer. As a proof of concept, the flexible hNCG is directly attached to a hand to scavenge energy using a human motion in various biomechanical frequencies for self‐powered wearable patch device applications. This research can pave the way for a new approach to high‐performance wearable and biocompatible self‐sufficient electronics. A hybrid 1‐3 nanocomposite employing perovskite BaTiO3 nanowires and poly(vinylidene fluoride‐co‐trifluoroethylene) is first developed to demonstrate a performance‐advanced, cost‐effective and simple‐processed flexible energy harvester. This new nanocomposite generator presents noteworthy output performance with higher charge flows even than piezoceramic thin‐film‐based flexible energy harvesters.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201704022