Smart Lanceolate Surface with Fast Fog-Digesting Performance for Triboelectric Energy Harvesting

Area of Science:

• Materials Science
• Energy Harvesting
• Biomimetics

Background:

• Decentralized energy harvesting from natural fog offers sustainable power generation potential.
• Current fogwater energy-harvesting technologies face challenges in efficient fogwater utilization.
• The water-harvesting behavior of Tillandsia leaves provides a model for improved fog capture.

Purpose of the Study:

• To develop a novel surface for harvesting triboelectric energy from fog by mimicking Tillandsia leaf structures.
• To enhance the efficiency of fogwater utilization in atmospheric water energy devices.
• To address limitations in current fog-based energy harvesting technologies.

Main Methods:

• A smart lanceolate surface was designed using acylated cellulose ester with specific hydrophilic sites.
• The surface was engineered for precise fog capture, transportation, and droplet separation.
• The triboelectric energy generation mechanism was investigated as fog droplets migrated across the surface.

Main Results:

• The biomimetic surface demonstrated effective fog management, including capture and transport.
• Fog droplets condensed on hydrophilic sites and migrated, generating energy.
• The device achieved a water-digestion rate of up to 71.05 kg/m² h and charged a capacitor to 11.59 V in 20 s.

Conclusions:

• The biomimetic surface significantly enhances fogwater digestion efficacy for energy harvesting.
• This approach offers a promising solution for sustainable power generation using atmospheric water.
• The study provides new perspectives for overcoming deficiencies in existing power resources through nature-inspired designs.