Energy harvesting textiles for a rainy day: woven piezoelectrics based on melt-spun PVDF microfibres with a conducting core
Artikel i vetenskaplig tidskrift, 2018

Recent advances in ubiquitous low-power electronics call for the development of light-weight and flexible energy sources. The

textile format is highly attractive for unobtrusive harvesting of energy from e.g., biomechanical movements. Here, we report the

manufacture and characterisation of fully textile piezoelectric generators that can operate under wet conditions. We use a weaving

loom to realise textile bands with yarns of melt-spun piezoelectric microfibres, that consist of a conducting core surrounded by β-

phase poly(vinylidene fluoride) (PVDF), in the warp direction. The core-sheath constitution of the piezoelectric microfibres results in

a—for electronic textiles—unique architecture. The inner electrode is fully shielded from the outer electrode (made up of

conducting yarns that are integrated in the weft direction) which prevents shorting under wet conditions. As a result, and in

contrast to other energy harvesting textiles, we are able to demonstrate piezoelectric fabrics that do not only continue to function

when in contact with water, but show enhanced performance. The piezoelectric bands generate an output of several volts at strains

below one percent. We show that integration into the shoulder strap of a laptop case permits the continuous generation of four

microwatts of power during a brisk walk. This promising performance, combined with the fact that our solution uses scalable

materials and well-established industrial manufacturing methods, opens up the possibility to develop wearable electronics that are

powered by piezoelectric textiles.

npj Flexible Electronics (2018) 2:9 ; doi:



Anja Lund

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

npj Flexible Electronics

Vol. 2 9-


Elektroteknik och elektronik



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