Water-based graphene oxide inks for inkjet-printed flexible moisture energy generators

Area of Science:

• Materials Science
• Energy Harvesting
• Nanotechnology

Background:

• Growing demand for sustainable energy and waste reduction.
• Need for battery-free technologies powered by renewable sources.
• Potential of graphene oxide (GO) in energy applications.

Purpose of the Study:

• To formulate and fabricate Moisture Energy Generators (MEGs) using graphene oxide (GO) and GO-PEDOT:PSS inks.
• To evaluate the performance of these MEGs in converting ambient moisture energy into voltage.
• To explore the potential for low-cost, sustainable energy harvesting for portable and wearable devices.

Main Methods:

• Formulation of water-based GO and GO-PEDOT:PSS inks from inexpensive precursors.
• Inkjet printing of GO-based moisture-active films onto flexible substrates.
• Performance evaluation of fabricated MEGs using a custom automated humidity chamber.

Main Results:

• Fabricated MEGs demonstrated voltage output from ambient moisture variations.
• Pure GO MEGs yielded an average voltage output of 183 mV.
• GO-PEDOT:PSS MEGs achieved an average voltage output of 194 mV within a 45-95% relative humidity range.

Conclusions:

• The developed MEGs offer a promising low-cost energy harvesting solution.
• This technology can contribute to the development of self-powered portable and wearable electronics.
• The study supports a reduction in battery dependence and electronic waste.