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Roll-to-roll continuous carbon nanotube sheets with high electrical conductivity
Songlin Zhang1,2, Branden E Leonhardt1,3, Nam Nguyen1,2
1High-Performance Materials Institute, Florida State University 2005 Levy Ave. Tallahassee FL 32310 USA.
RSC Advances
|May 11, 2022
Summary
Researchers developed a cost-effective method for manufacturing highly conductive carbon nanotube (CNT) sheets using roll-to-roll production. This stable material offers potential for advanced applications in electronics and energy storage.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Large-scale manufacturing of electrically conductive carbon nanotube (CNT) sheets faces challenges in cost, production capability, and long-term electrical stability.
- Developing continuous, high-performance CNT materials is crucial for various advanced applications.
Purpose of the Study:
- To report a novel method for fabricating highly conductive continuous buckypaper (CBP) with roll-to-roll production capability.
- To enhance the electrical conductivity and long-term stability of CNT sheets for practical applications.
Main Methods:
- Fabrication of continuous buckypaper (CBP) using a roll-to-roll production method.
- Oxidant chemical doping of CBP using nitric acid (HNO3) and iodine (I2) to improve electrical conductivity.
- Coating CBP with a poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) polymer layer to enhance doping stability.
Main Results:
- Achieved an electrical conductivity of 7.6 × 10^4 S m^-1 for the doped CBP.
- Demonstrated stable electrical performance of the fabricated CBP in air for over a month.
- The PEDOT:PSS coating effectively compensated for conductivity degradation from oxidant chemical doping.
Conclusions:
- The developed CBP material exhibits high electrical conductivity, cost-effectiveness, and roll-to-roll manufacturing feasibility.
- This material is suitable for diverse engineering applications, including flexible conductors, electromagnetic interference (EMI) shielding, and energy device electrodes.
- The combination of chemical doping and polymer coating offers a promising strategy for stable, high-performance CNT-based materials.
