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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
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Leaves for high power density hydrovoltaic generators.

Neha M Viradia1, Ramesh Y Adhikari1

  • 1Department of Physics & Astronomy, Colgate University, Hamilton, NY 13346, USA.

Iscience
|June 10, 2025
PubMed
Summary

Researchers developed novel leaf-based hydrovoltaic generators, achieving high power density for sustainable electricity generation. These bio-based devices offer a promising avenue for green electronics and powering small devices.

Keywords:
Energy engineeringEnergy materialsEnergy systems

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Area of Science:

  • Materials Science
  • Green Electronics
  • Energy Harvesting

Background:

  • Hydrovoltaic generators produce electricity from water molecule motion via microporous channels.
  • Current limitations include low power density and short-term power generation.

Purpose of the Study:

  • To develop high-performance, sustainable hydrovoltaic generators using natural materials.
  • To overcome the limitations of existing hydrovoltaic devices.

Main Methods:

  • Utilized a leaf-based structure for hydrovoltaic generator fabrication.
  • Characterized the electrical output, including open circuit voltage and current density.

Main Results:

  • Achieved an open circuit voltage of up to 1.47 V.
  • Generated a short circuit current density of up to 4.68 mA/cm² and power density of up to 390 μW/cm².
  • Demonstrated fast charging of supercapacitors and powering of an LED and environmental sensor.

Conclusions:

  • Leaf-based hydrovoltaic generators offer significantly improved power density.
  • Natural materials and their inherent structures are viable for developing efficient green electronics.
  • These devices show potential for powering small electronic components and sensors sustainably.