Double-Layer Electronegative Structure-Based Triboelectric Nanogenerator for Enhanced Performance Using Combined...

Area of Science:

• Materials Science
• Nanotechnology
• Energy Harvesting

Background:

• Triboelectric nanogenerators (TENGs) are crucial for harvesting mechanical energy.
• TENG performance relies on surface charge generation and retention.
• Optimizing the electronegative layer is key to improving TENG efficiency.

Purpose of the Study:

• To develop and characterize a double-layer nanocomposite structure for the electronegative layer of a TENG.
• To investigate the impact of this structure on charge generation and retention.
• To evaluate the overall performance enhancement of the TENG device.

Main Methods:

• Fabrication of a double-layer nanocomposite using PVDF/MXene and PDMS/NaNbO3.
• Characterization using Kelvin probe force microscopy (KPFM).
• Performance testing of the TENG device, measuring voltage, current, and power density.

Main Results:

• The double-layer structure achieved 150 V and 4.3 μA, yielding a power density of 134 μW/cm², approximately 5.8 times higher than a single-layer TENG.
• MXene in the PVDF matrix enhanced electron affinity for improved charge generation.
• NaNbO3 nanoparticles in PDMS increased internal polarization and trap sites for better charge retention.

Conclusions:

• The proposed double-layer nanocomposite structure significantly enhances TENG performance through improved charge generation and retention.
• This optimized TENG demonstrates potential for applications like wireless communication signal transfer.
• The findings offer a promising pathway for developing high-performance TENG devices.