Device to generate electricity from raindrops developed by IIT Delhi researchers
By MYBRANDBOOK
IIT Delhi researchers have developed a device called “Liquid-solid Interface Triboelectric Nanogenerator” which can generate electricity from water drops, raindrops, water streams and even from the ocean using an effect called “Triboelectric Effect” and “Electrostatic Induction”. It's made of specially designed nanocomposite polymers and contact electrodes. It can generate a few milliwatt of power, which can power small electronic devices like watches, healthcare sensors.
IIT-Delhi in a statement said, “The device has a very simple structure consisting of specially designed nanocomposite polymers and contact electrodes and can generate a few milliwatts (mW) of power, which is sufficient to power small electronic devices like watches, digital thermometers, radio frequency transmitters, healthcare sensors, pedometers. When compared to conventional methods, such as the use of the piezoelectric effect, the present device can generate significantly more electricity."
Neeraj Khare, a professor of physics, and his group at the Nanoscale Research Facility (NRF) at IIT-Delhi have been working on harvesting electrical energy from mechanical vibrations using the triboelectric effect. The group has filed an Indian patent on the various aspects of the use of ferroelectric polymer for harvesting mechanical energy including the present device.
According to Khare, “Triboelectric effect has been a known phenomenon for a long time, and in this effect, charges are generated when two surfaces are in friction. The best example we see are sparkling lights when we move the blankets/jackets. It is only lately that it has been extensively investigated as a practical alternative for energy harvesting.”
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