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Updated: Jan 14, 2026
08:45
Glass-Based Devices to Generate Drops and Emulsions
Published on: April 5, 2022
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Floating droplet electricity generator on water
Wei Deng1, Zihao Wang1, Jingmin Wang2
1State Key Laboratory of Mechanics and Control for Aerospace Structures, Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
National Science Review
|October 20, 2025
Summary
This study introduces a new water-based electricity generator for hydrovoltaic energy harvesting. This innovative design significantly reduces weight and cost while maintaining high electrical output and durability.
Area of Science:
- Materials Science
- Energy Harvesting
- Sustainable Technology
Background:
- Hydrovoltaic technology offers potential for renewable energy generation from the water cycle.
- Conventional designs often rely on rigid substrates and metal electrodes, limiting scalability and increasing costs.
Purpose of the Study:
- To develop a novel water-integrated floating droplet electricity generator.
- To leverage natural water as both a bottom electrode and substrate for enhanced efficiency and reduced environmental impact.
Main Methods:
- Utilized a top electrode-dielectric-water architecture.
- Exploited water's incompressibility and high surface tension for structural support and unidirectional transport.
- Leveraged ion-rich water for high-frequency conductivity.
Main Results:
- Achieved high electrical output comparable to conventional generators.
- Demonstrated an 87% material weight reduction and 50% cost saving.
- Showcased excellent durability and scalability with a sub-square-meter device.
Conclusions:
- The water-integrated generator offers a sustainable and cost-effective approach to hydrovoltaic energy harvesting.
- This technology advances the use of natural water-like materials for scalable, land-free energy applications.
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