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Updated: Oct 5, 2025
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Fabrication, Densification, and Replica Molding of 3D Carbon Nanotube Microstructures
Published on: July 2, 2012
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Twist-Stabilized, Coiled Carbon Nanotube Yarns with Enhanced Capacitance
Wonkyeong Son1,2, Sungwoo Chun3, Jae Myeong Lee1
1Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea.
ACS Nano
|January 24, 2022
Summary
Researchers developed twist-stable, hydrophilic carbon nanotube (CNT) yarns using electrochemical oxidation (ECO). This method enhances yarn stability and capacitance, enabling new wearable supercapacitor applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Coil-structured carbon nanotube (CNT) yarns offer promise but suffer from structural instability and hydrophobicity.
- These limitations hinder their widespread adoption in advanced applications.
Purpose of the Study:
- To develop a twist-stable and hydrophilic coiled CNT yarn.
- To enhance the performance of CNT yarns for energy storage applications.
Main Methods:
- Electrochemical oxidation (ECO) using low potentiostatic voltages (3.0-4.5 V vs Ag/AgCl) for 10-30 seconds.
- Morphological analysis including surface microbuckling and reduction in yarn bias angle and diameter.
- Fabrication of stretchable supercapacitors using ECO-treated CNT yarns.
Main Results:
- ECO treatment resulted in twist-stable, hydrophilic CNT yarns with increased density.
- Significant capacitance improvement (approximately 17-fold) due to functionalization with oxygen-containing groups.
- Fabricated supercapacitors demonstrated high capacitance (12.48 mF/cm and 172.93 mF/cm²) and 80% stretchability.
Conclusions:
- The facile ECO method effectively enhances the stability and hydrophilicity of coiled CNT yarns.
- ECO-treated CNT yarns are suitable for high-performance, stretchable, and wearable supercapacitors.
- The developed yarns can be integrated into wearable devices like masks for energy storage.
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