Abstract
This study improves the thermoelectric performance of single-walled carbon nanotube (SWCNT) films with different concentrations of SWCNT dispersions with an anionic surfactant. The SWCNT dispersions were prepared by adding SWCNT powders and sodium dodecylbenzene sulfonate (SDBS) as the anionic surfactant in deionized water, followed by ultrasonic dispersion using a homogenizer. The dispersion concentration, which is defined as the weight ratio of SWCNTs and SDBS to deionized water, was varied from 0.1 to 0.3 wt%. The freestanding SWCNT films (Buckypaper) were prepared by vacuum filtration. In-plane thermoelectric properties, including the Seebeck coefficient, electrical conductivity, and power factor, of the SWCNT films were measured at approximately 300 K. As a result, all thermoelectric properties showed the highest values at a concentration of 0.2 wt%. These results indicate that the dispersion condition is a key factor in improving thermoelectric performance, and the findings in this study are useful for the improvement of various functional materials using dispersion processes.
https://ror.org/01p7qe739 
