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High-Output-Performance TENG Based on Random-Height Micropillar Structures.

Min Li1, Peng Yi1, Xiaowei Li1

  • 1Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.

ACS Applied Materials & Interfaces
|October 13, 2025
PubMed
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This summary is machine-generated.

Researchers enhanced triboelectric nanogenerators (TENGs) by creating random-height micropillar structures on their surfaces. This innovation significantly boosts energy harvesting capabilities for practical applications.

Area of Science:

  • Energy Harvesting
  • Materials Science
  • Nanotechnology

Background:

  • Triboelectric nanogenerators (TENGs) harness mechanical friction energy.
  • Improving TENG output performance is crucial for widespread adoption.
  • Surface micro/nanostructures critically influence TENG performance.

Purpose of the Study:

  • To develop a novel method for fabricating surface micro/nanostructures on TENGs.
  • To enhance the output performance of TENGs through improved surface topography.
  • To investigate the impact of random-height micropillar structures (RHMs) on TENG energy generation.

Main Methods:

  • Fabrication of random-height micropillar structures (RHMs) using femtosecond laser composite imprinting.
  • Characterization of the micro/nanostructure's effect on triboelectric layer surface.
Keywords:
air gapsfemtosecond laserrandom-height micropillarsspatial-temporal shapingtriboelectric nanogenerator

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  • Testing the output performance of the RHMs-TENG under mechanical pressure.

    • Main Results:

    • RHMs significantly expand the effective friction area by creating multiple contact points.
    • Differential deformation of RHMs generates additional triboelectric charge and electric fields.
    • The RHMs-TENG demonstrated a 20.6-fold increase in open-circuit voltage compared to unstructured PDMS.
    • Achieved excellent cycling stability with only 2.7% attenuation after 25,000 cycles.
    • Successfully powered 100 LEDs, showcasing practical energy harvesting potential.

    Conclusions:

    • Fabricating RHMs on triboelectric layers is an effective strategy to enhance TENG output.
    • The synergistic effects of increased contact area, charge generation, and electric fields boost TENG performance.
    • This approach offers a promising pathway for developing high-performance TENG devices.