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Lookup NU author(s): Patryk Wojciak, Dr Toby HallamORCiD, Dr Shayan SeyedinORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2025 The Author(s). Advanced Materials Technologies published by Wiley-VCH GmbH.The increasing demand for sustainable energy solutions has stimulated interest in technologies that generate electrical energy from ambient mechanical energy. Piezoelectric materials, in this respect, are promising owing to the property of converting mechanical stress into electrical energy and represent an ideal active material platform in applications pertaining to stretchable electronics. However, conventional piezoelectric materials face a dilemma in balancing their mechanical flexibility with efficient energy conversion, limiting their practical applications in wearable devices. This work resolves this challenge by incorporating BaTiO3 nanoparticles, with high piezoelectric coefficients, into a polyurethane (PU) matrix to develop composite films with balanced stretchability and piezoelectric properties. The PU/BaTiO3 composite films exhibit a high stretchability of 336% at 30 wt.% BaTiO3 loading, well above the 55% minimum stretchability required for wearable applications. These films generate a peak-to-peak piezoelectric voltage response of ≈31 V under 1 bar compression, proving their capability to efficiently convert mechanical stress into usable electrical energy. The composites are utilized in a piezoelectric energy harvesting system to charge a commercial capacitor, demonstrating practical energy generation from human motion. The findings in this work represents an advancement toward developing flexible energy harvesting devices for wearable electronics and further sustainable energy technologies.
Author(s): Wojciak P, Smith JG, Hallam T, Seyedin S
Publication type: Article
Publication status: Published
Journal: Advanced Materials Technologies
Year: 2025
Pages: epub ahead of print
Online publication date: 07/04/2025
Acceptance date: 02/04/2018
Date deposited: 23/04/2025
ISSN (print): 2365-709X
Publisher: John Wiley and Sons Inc
URL: https://doi.org/10.1002/admt.202500248
DOI: 10.1002/admt.202500248
Data Access Statement: The data that support the findings of this study are available from the corresponding author upon reasonable re
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