Three-Phase Interfacial Force Regulated Solid-Like Liquid-Slider for Highly Efficient and Robust Triboelectric...

Area of Science:

• Materials Science
• Energy Harvesting
• Nanotechnology

Background:

• Conventional triboelectric nanogenerators (TENGs) face efficiency and stability issues due to solid-solid friction.
• Optimizing contact and friction is crucial for improving TENG performance.

Purpose of the Study:

• To propose and demonstrate a novel liquid-slider triboelectric nanogenerator (LS-TENG).
• To investigate the regulation of solid-liquid-gas interfacial forces for enhanced energy harvesting.
• To achieve high energy conversion efficiency and long-term stability in TENGs.

Main Methods:

• Designed a liquid-driver system with hydrophilic and hydrophobic interfaces to govern liquid motion.
• Employed theoretical analysis and experimental methods to regulate three-phase interfacial forces.
• Utilized shape-adaptive and ultra-smooth liquid properties for efficient energy conversion.

Main Results:

• Achieved a record-high energy conversion efficiency of 63.47% with a palm-sized LS-TENG.
• Demonstrated stable operation for over six months due to optimized solid-liquid friction.
• Successfully powered 960 green LEDs and enabled wireless wind speed monitoring using ambient breeze.

Conclusions:

• The LS-TENG offers a promising approach for efficient and reliable mechanical energy harvesting.
• Regulation of three-phase interfacial forces is key to advancing TENG technology.
• LS-TENGs have potential applications in self-powered sensors and low-power electronics.