What is it about?
Here, we present a device, called nanogenerator, which can can convert the applied mechanical energy to electrical energy (e.g., by actuating with a human finger 50 blu LEDs are illuminated and no need of battery to charge up the small portable gadgets).
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Why is it important?
Here, we have demonstrated self-poled, porous hybrid "ferroelectretic" polymer nanocomposite film by in situ generation of platinum (Pt) nanoparticles (NPs) embedded in poly(vinylidenefluoride-co-hexafluoropropylene) (P(VDF– HFP)). It exhibits superior electrical square-shaped hysteresis loop with large remnant polarization Pr=61.7 microC/cm2), piezoelectric charge coefficient (d33~686 pC/N), and ultrahigh dielectric properties (er= 2678, tand=0.79 at 1 kHz). Not only that, the harvested electricity is 18 V of the open-circuit output voltage with expected 17.7 microA short-circuit current, generated by human finger touch. The operation of more than 50 blue LEDs, 25 green LEDs, and several capacitors without any subsidiary batteries is demonstrated using the nanogenerator.
Perspectives
Everyday, enormous amount of energies are wasted during walking, running, talking and so on. The way to capture and then use the energies in a scalable manner is very important as an alternate source of energy of fossil fuel. This work represents a simple approach to achive a high performance piezoelectric material to fabricate a nanogenerator which can be operated by single finger touch and other human motion to operate daily consumer electronics. Also, there is video proof of the demonstration. Though it was not uploaded but if anyone is interested then we can supply the video file of demonstration.
Dr. Sujoy Kumar Ghosh
NEST, Istituto Nanoscienze-CNR,Pisa, Italy
Read the Original
This page is a summary of: Self-poled Efficient Flexible “Ferroelectretic” Nanogenerator: A New Class of Piezoelectric Energy Harvester, Energy Technology, September 2015, Wiley,
DOI: 10.1002/ente.201500167.
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