Title

Highly Stretchable Self-Powered Wearable Electrical Energy Generator and Sensors

Publication Name

Advanced Materials Technologies

Abstract

The ubiquity of wearables, coupled with the increasing demand for power, presents a unique opportunity for fiber-based mobile energy generator systems. However, no commercially available systems currently exist with typical problems including low energy efficiency; short cycle life; slow and expensive manufacturing; and stiff, heavy or bulky componentry that reduce wearer comfort and aesthetic appeal. Herein, a new method is demonstrated to create wearable energy generators and sensors using nanostructured hybrid polyvinylidene fluoride (PVDF)/reduced graphene oxide (rGO)/barium-titanium oxide (BT) piezoelectric fibers and exploiting the enormous variety of textile architectures. Highly stretchable piezoelectric fibers based on coiled PVDF/rGO/BT fibers energy generator and sensor are developed. It is found that the coiled PVDF/ rGO/BT enables to stretch up to ≈100% strain that produces a peak voltage output of ≈1.3 V with a peak power density of 3 W Kg which is 2.5 times higher than previously reported for piezoelectric textiles. An energy conversion efficiency of 22.5% is achieved for the coiled hybrid piezofiber energy generator. A prototype energy generator and sensors based on a hybrid piezofibers wearable device for energy harvesting and monitoring real time precise healthcare are demonstrated. −1

Open Access Status

This publication may be available as open access

Volume

6

Issue

2

Article Number

2000841

Funding Number

DE130100517

Funding Sponsor

Australian National Fabrication Facility

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/admt.202000841