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- W3110563733 abstract "Abstract Flexible 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 $$upmu mathrm{W}/{mathrm{cm}}^{2}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>μ</mml:mi> <mml:mi>W</mml:mi> <mml:mo>/</mml:mo> <mml:msup> <mml:mrow> <mml:mi>cm</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msup> </mml:mrow> </mml:math> under a sinusoidal acceleration of 3.9 g at 40 Hz. In a variable capacitor configuration, a bias of 0.15 $$mathrm{V}/upmu mathrm{m}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>V</mml:mi> <mml:mo>/</mml:mo> <mml:mi>μ</mml:mi> <mml:mi>m</mml:mi> </mml:mrow> </mml:math> 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." @default.
- W3110563733 created "2020-12-07" @default.
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- W3110563733 date "2020-11-26" @default.
- W3110563733 modified "2023-10-18" @default.
- W3110563733 title "Integration of a soft dielectric composite into a cantilever beam for mechanical energy harvesting, comparison between capacitive and triboelectric transducers" @default.
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- W3110563733 doi "https://doi.org/10.1038/s41598-020-77581-2" @default.
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