Sustainable and superior polymeric piezoelectric nanogenerator for sensing human body vibration, air flow, and water wave

A simple, lightweight, cost-effective, bio-compatible, and highly sensitive piezoelectric nanogenerator has been sketched in a sustainable manner using naturally available clay, i.e., kaolinite doped poly(vinylidene fluoride) film. The developed nanogenerator is able to produce electrical signals by capturing a very small mechanical signal of our living systems. Very low mechanical impulse due to human body vibration, air flow, and water wave has been well adsorbed by our fabricated piezoelectric nanogenerator to generate electrical output signals. The device generates output voltages (peak to peak) of similar to 1.4V, 325 mV, and 230mV under human body vibration, air flow, and water wave, respectively. Moreover, under gentle finger impartation (force, similar to 12.5N), the device can generate an open circuit voltage of similar to 45V and a short circuit current of similar to 2.9 mu A. The results remain almost same for a long tested time duration (similar to 12months). The power density is calculated to be 43.5 mW/cm(3). A capacitor (similar to 1 mu F) is charged up to similar to 2.8V within 18 s, and several LEDs are lightened using our device as an energy supplier.

Automated summary

The developed piezoelectric nanogenerator using kaolinite exhibits high sensitivity, able to generate electrical signals from small mechanical impulses caused by human body vibration, air flow, and water wave. It shows stable performance over long-term testing with high power density.