High-performance all-carbon yarn micro-supercapacitor for an integrated energy system

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Flexible energy storage is crucial for portable and wearable electronics.
• Developing high-performance materials for micro-supercapacitors remains a challenge.

Purpose of the Study:

• To fabricate flexible all-solid-state yarn micro-supercapacitors.
• To investigate the electrochemical performance of these novel devices.

Main Methods:

• Preparation of single-walled carbon nanotubes and chitosan composite yarn via wet-spinning.
• Thermal treatment to obtain mesoporous all-carbon yarn.
• Fabrication of yarn micro-supercapacitors using the all-carbon yarn.

Main Results:

• The fabricated micro-supercapacitors exhibit high specific capacitance and energy density.
• Excellent rate capability and stable cycling life were demonstrated.
• The all-carbon yarn serves as a promising electrode material.

Conclusions:

• The developed mesoporous all-carbon yarn is suitable for flexible energy storage applications.
• These findings present a new avenue for advanced portable and wearable electronic devices.