Superlow Thermal Conductivity
3D Carbon Nanotube Network
for Thermoelectric Applications
- Publication date
- Publisher
Abstract
Electrical and thermal transportation properties of a
novel structured
3D CNT network have been systematically investigated. The 3D CNT net
work maintains extremely low thermal conductivity of only 0.035 W/(m
K) in standard atmosphere at room temperature, which is among the
lowest compared with other reported CNT macrostructures. Its electrical
transportation could be adjusted through a convenient gas-fuming doping
process. By potassium (K) doping, the original p-type CNT network
converted to n-type, whereas iodine (I<sub>2</sub>) doping enhanced
its electrical conductivity. The self-sustainable homogeneous network
structure of as-fabricated 3D CNT network made it a promising candidate
as the template for polymer composition. By in situ nanoscaled composition
of 3D CNT network with polyaniline (PANI), the thermoelectric performance
of PANI was significantly improved, while the self-sustainable and
flexible structure of the 3D CNT network has been retained. It is
hoped that as-fabricated 3D CNT network will contribute to the development
of low-cost organic thermoelectric area
