Solution-Processed Carbon Nanotube Buckypapers for Foldable Thermoelectric Generators.

Area of Science:

• Materials Science
• Nanotechnology
• Energy Conversion

Background:

• Single-walled carbon nanotubes (SWCNTs) are promising for thermoelectric applications.
• Developing efficient and flexible thermoelectric devices remains a challenge.

Purpose of the Study:

• To fabricate freestanding SWCNT buckypapers.
• To investigate the influence of dispersion solvent on thermoelectric properties.
• To construct a foldable thermoelectric generator.

Main Methods:

• Bar-coating process for fabricating SWCNT buckypapers (∼30 μm thickness).
• Analysis of Seebeck coefficient and electrical conductivity.
• Fabrication of a foldable thermoelectric generator using SWCNT buckypapers.

Main Results:

• Optimized dispersion solvent composition enhanced thermoelectric properties.
• Achieved a maximum p-type power factor of 411 ± 13 μW m^-1 K^-2.
• Foldable generator (2.25 cm²) produced 10.3 μW at 30 K temperature difference.

Conclusions:

• The number density of junctions between SWCNT bundles influences thermoelectric performance.
• SWCNT buckypapers offer a versatile platform for flexible thermoelectric devices.
• Demonstrated potential for wearable and portable power generation.