Fiber-Based Electret Nanogenerator with a Semisupported Structure for Wearable Electronics

Area of Science:

• Materials Science
• Electrical Engineering
• Wearable Technology

Background:

• Fiber-based nanogenerators are crucial for wearable electronics, including portable nanodevices and e-skin.
• Existing nanogenerators face challenges in stability and efficiency for practical applications.

Purpose of the Study:

• To develop a novel fiber-based electret nanogenerator (FENG) with enhanced performance and stability.
• To demonstrate the FENG's potential for harvesting mechanical energy in wearable applications.

Main Methods:

• Fabrication of a fiber-based electret nanogenerator with a semisupported core-shell structure.
• Testing of the FENG's electrical output (open-circuit voltage and short-circuit current) under various conditions.
• Development of a FENG-based wearable fabric for harvesting mechanical energy from human motion.

Main Results:

• The FENG achieved an open-circuit voltage of 40 V and a short-circuit current of 0.6 μA at a short working distance.
• The device exhibited excellent stability and reliability, with no performance degradation after >16 hours of continuous operation and across humidity levels from 20-95%.
• Universal materials like cotton rope and conductive sewing thread were successfully used for FENG fabrication.

Conclusions:

• The developed FENG is highly effective, reliable, and stable for harvesting mechanical energy.
• This advancement promotes the development of fiber-based nanogenerators for self-powered wearable electronics.
• The FENG shows significant potential for applications in portable nanodevices, e-skin, and AI systems.