Author:
Pruvost Mickaël,Smit Wilbert J.,Monteux Cécile,Del Corro Pablo,Dufour Isabelle,Ayela Cédric,Poulin Philippe,Colin Annie
Abstract
AbstractFlexible dielectrics that harvest mechanical energy via electrostatic effects are excellent candidates as power sources for wearable electronics or autonomous sensors. The integration of a soft dielectric composite (polydimethylsiloxane PDMS-carbon black CB) into two mechanical energy harvesters is here presented. Both are based on a similar cantilever beam but work on different harvesting principles: variable capacitor and triboelectricity. We show that without an external bias the triboelectric beam harvests a net density power of 0.3 $$\upmu \mathrm{W}/{\mathrm{cm}}^{2}$$
μ
W
/
cm
2
under a sinusoidal acceleration of 3.9g at 40 Hz. In a variable capacitor configuration, a bias of 0.15 $$\mathrm{V}/\upmu \mathrm{m}$$
V
/
μ
m
is required to get the same energy harvesting performance under the same working conditions. As variable capacitors’ harvesting performance are quadratically dependent on the applied bias, increasing the bias allows the system to harvest energy much more efficiently than the triboelectric one. The present results make CB/PDMS composites promising for autonomous portable multifunctional systems and intelligent sensors.
Funder
DIM Poreux
Agence Nationale de la Recherche
Publisher
Springer Science and Business Media LLC
Cited by
5 articles.
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