To demonstrate the energy harvesting property of piezo PVDF film.
- A packaged piezo PVDF film: active area 50 mm x 100 mm (d31 >28 pC/N) and thickness of 120 um. Capacitance of 5 nF. Surfaced protected with ultrathin PET tape (10 um). Can generate >100 V output voltage when shaking. With robust ring connector and 5 um thick silver ink electrode for long-term operation.
- An energy management and storage circuit, which converts 0 to +/-500 V DC/AC input electrical energy (from piezo, solar, etc) to output of 5 V and storage them in a pair of ultracapacitor. Output voltage 3.1 to 5.2 Vdc, up to 55 mJ.
- One cable connect the output of piezo PVDF to the input of the energy harvesting circuit, another cable control the output of the energy harvesting circuit.
- A firefly demo, shaking a 110 um thick piezo PVDF film can power a neon light (>100 V)
The 3.1-5.2 Vdc output can be used to charge personal electronics or wireless sensors.
The energy harvesting demo can be used to harvest energy from vibration source (to laminate with another layer thick PET tape, provided) or from human walking (under shoe).
Made with PolyK piezo PVDF film with high d31. The 120 um thick piezo film with silver electrode is a good material for energy harvesting due to its mechanical robustness and high output voltage: http://piezopvdf.com/pvdf-piezoelectric-film-120-um-thick-silver-ink/
Other sensor size can be produced upon request.
Youtube video on firefly: http://youtu.be/50nsz4Z6U1Y
You can also make your own energy harvesting "shoe" sole by following this procedure: