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Erschienen in:
01.08.2011
Synthesis of expanded graphite filled polyaniline composites and evaluation of their electrical and electrochemical properties
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 8/2011
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Abstract
A series of conducting polyaniline/expanded graphite (PA/EG) composite was synthesized by in situ polymerization of aniline in acid medium followed by the addition of expanded graphite in various proportions (1, 2 and 3 wt%). The synthesized samples were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, ultraviolet–visible absorption, X-ray diffraction and by electrical conductivity measurements. The dc electrical conductivities of the composites were dramatically increased compared with pure polyaniline and found to be 0.50 × 102 S/cm to 6.11 × 102 S/cm. The PA/EG composites showed a reversible electrochemical response up to 150th repeated cycles as revealed by the cyclic voltametry study.