Biomimetic Strawberry-Structured Micro/Nano Fibers as Positive Friction Layers for High-Performance Triboelectric...

Area of Science:

• Materials Science
• Nanotechnology
• Energy Harvesting

Background:

• Electrospun triboelectric nanogenerators (TENGs) are crucial for flexible and wearable electronics.
• Enhancing the charge-trapping ability of TENGs is key to improving their performance.
• Biomimetic structures offer novel pathways for advanced material design.

Purpose of the Study:

• To develop a novel biomimetic strawberry-structured material for TENG applications.
• To investigate the relationship between micro/nano fiber structure and TENG performance.
• To optimize the output characteristics of the multistrawberry-structured TENG (MSS-TENG).

Main Methods:

• Utilized free-surface electrospinning to create multistrawberry-structured (MSS) micro/nano fibers.
• Fabricated TENGs using MSS fibers as the positive friction layer.
• Systematically analyzed the impact of various parameters (microstructure, contact area, force, etc.) on device performance.

Main Results:

• The MSS micro/nano fibers exhibited a 1.5-fold increase in dielectric constant, enhancing charge trapping.
• The optimal MSS-TENG achieved an open-circuit voltage of 301.93 V and a power density of 0.617 W/m².
• Demonstrated stable power output for nearly 40 minutes and successfully powered 300 LEDs and portable electronics.

Conclusions:

• Biomimetic strawberry structures significantly enhance TENG performance through increased surface area and dielectric properties.
• MSS-TENGs offer a promising solution for efficient energy harvesting in flexible and wearable electronic devices.
• The developed fabrication method and device design pave the way for next-generation self-powered systems.