Thread-like supercapacitors based on one-step spun nanocomposite yarns

Area of Science:

• Materials Science
• Nanotechnology
• Energy Storage

Background:

• Wearable electronics require flexible and high-performance energy storage solutions.
• Thread-like electronic devices are emerging as a promising platform for integration into textiles.
• Existing energy storage devices often lack the necessary flexibility and mechanical robustness for wearable applications.

Purpose of the Study:

• To develop high-performance, thread-like supercapacitors suitable for wearable electronics.
• To investigate the fabrication of flexible composite yarns from single-walled carbon nanotubes and polyaniline nanowires.
• To evaluate the electrochemical and mechanical properties of the resulting thread-like supercapacitors.

Main Methods:

• Preparation of stable dispersions of single-walled carbon nanotubes (SWCNTs) and conducting polyaniline nanowires (PAniNWs).
• One-step spinning of the mixture into flexible yarns with a polyvinyl alcohol sheath.
• Washing to remove surfactants, followed by coating with gel electrolyte.
• Twisting two composite yarns to form a thread-like supercapacitor.

Main Results:

• The composite yarns exhibited excellent mechanical properties and high electrical conductivities after processing.
• The thread-like supercapacitors demonstrated significantly higher specific capacitance compared to pure SWCNT yarns.
• The fabricated supercapacitors are flexible and possess properties suitable for energy storage in wearable devices.

Conclusions:

• A novel method for fabricating high-performance thread-like supercapacitors using SWCNTs and PAniNWs has been established.
• The developed supercapacitors offer superior energy storage capabilities for the demands of wearable electronics.
• This research paves the way for advanced, integrated energy solutions in the field of smart textiles and wearable technology.