Carbon Threads Supercapacitors for Washable e-Textile Applications: Configurations and Electrochemical Performance

Area of Science:

• Materials Science
• Electrochemistry
• Textile Engineering

Background:

• Emerging e-textiles require self-sustaining, lightweight power solutions for wearable technology.
• Sweat presents a potential electrochemical energy source for sports textiles.
• Carbon fiber materials offer promising properties for flexible electronic components.

Purpose of the Study:

• To design and fabricate a self-sustaining 1D carbon fiber capacitor for e-wear applications.
• To investigate the use of simulated sweat as an electrolyte for textile-based energy storage.
• To enhance the performance of carbon fiber electrodes through polypyrrole functionalization.

Main Methods:

• Fabrication of a 1D carbon fiber capacitor using commercial carbon threads as electrodes.
• Utilization of simulated sweat solution as the electrolyte.
• Employing electrospun cellulose acetate and felt as separators.
• Functionalization of carbon fibers with polypyrrole (PPy).
• Testing in braided and woven electrode configurations.

Main Results:

• The carbon fiber capacitor design successfully utilized simulated sweat as an electrolyte.
• Polypyrrole functionalization increased the specific capacity by approximately an order of magnitude (0.62 F/g).
• The devices demonstrated washability and durability over at least 1000 cycles.
• Braided and woven configurations were tested with different separator materials.

Conclusions:

• The developed carbon fiber capacitor is a viable self-sustaining power source for e-textiles.
• Polypyrrole functionalization is an effective strategy to enhance capacitor performance.
• The use of sweat as an electrolyte offers a sustainable energy solution for wearable devices.
• The demonstrated durability supports potential applications in sports textiles.