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Liquid Jet-Based Triboelectric Nanogenerator.

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Advanced Materials (Deerfield Beach, Fla.)
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This study introduces a novel liquid-jet triboelectric nanogenerator (PR-TENG) that overcomes efficiency limits in energy harvesting. By converting continuous flow into high-frequency droplets, PR-TENG significantly boosts electrical output for flow-based applications.

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Plateau‐Rayleigh instabilitycharge transferenergy harvestingliquid jettransformation of water

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Nanotechnology

Background:

  • Solid-liquid triboelectric nanogenerators (TENGs) face efficiency limitations due to the electric double layer (EDL) shielding effect.
  • Continuous liquid flow in conventional TENGs hinders optimal energy conversion.

Purpose of the Study:

  • To demonstrate a liquid-jet triboelectric nanogenerator (PR-TENG) that overcomes EDL shielding effects.
  • To enhance energy harvesting efficiency from continuous water flow.

Main Methods:

  • Exploiting Plateau-Rayleigh instability to convert low-frequency flow into high-frequency droplets.
  • Utilizing droplet-fusion-induced triboelectrification, surface charge trapping, and charge redistribution for energy generation.

Main Results:

  • Achieved a contact-separation frequency of approximately 50 Hz, avoiding continuous flow shielding.
  • Generated an output current exceeding 100 µA at a flow rate of 320 mL min⁻¹, approximately 120 times greater than conventional droplet TENGs.
  • Demonstrated potential for continuous flow energy harvesting and water-level monitoring.

Conclusions:

  • PR-TENG significantly improves electrical output performance compared to existing flow-based TENGs.
  • This technology offers an effective solution for harvesting energy from continuous water flow.
  • The PR-TENG mechanism opens new avenues for efficient nanogenerator design.