Polymer/carbon nanotube (CNT) composites have lower electrical conductivity than pristine CNTs since the carrier barriers at the interface between the polymer and CNTs hinder the carrier pathways from tube to tube. Herein, polyaniline/polypyrrole/single wall carbon nanotube (SWCNT) ternary composites were fabricated by an in situ method. Ferric chloride (FeCl₃) was applied as a secondary dopant to further improve the electrical conductivity and the power factors of ternary composites. The electrical conductivity of the composite after FeCl₃ doping was 2.9 times higher than that of the composite before FeCl₃ doping, increasing the power factor by 2 fold. Scanning electronic microscopy (SEM) images, X-ray diffraction (XRD) patterns, Raman spectra and Fourier transform infrared spectra were used to characterize the properties of the ternary composites. The highest power factor was 19.2 μW m⁻¹ K⁻². The results demonstrate that using FeCl₃ as a secondary dopant to further dope polymer/SWCNT composites is a good strategy to enhance the thermoelectric properties of polymer/SWCNT composites.

Regulating the structure of p-type organic small molecules to generate thermoelectric composites for achieving a high power factor of 113.2 μW m ⁻¹ K ⁻² .

Curved organic small molecule and single-walled carbon nanotube composites with enhanced interactions for thermoelectric materials.