Abstract
Fiber-like polyaniline (PANI)/carbon nanohorn (CNH) composites (PACN composites) were prepared as elec- trode materials for supercapacitor by simple method that involves in-situ polymerization of aniline in the presence of CNH in acidic (HCl) medium with noteworthy electrochemical performances. Thus, the prepared PACN composites show high specific capacitance value of ! 834 F/g at 5 mV/s scan rate compared to ! 231 F/g for pure PANI and CNH (! 145 F/g) at same scan rate of 5 mV/s. CNHs are homogeneously dispersed throughout the matrix and coated successfully. Thus, it pro- vides more active sites for nucleation and electron transfer path. In addition, the composites show high electrical conductiv- ity in the order of ! 6.7·10 -2 S·cm -1 which indicates the formation of continuous interconnected conducting network path in the PACN composites. Morphological study of the PACN composites was carried out by high resolution transmission elec- tron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM).
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