In this study, polyaniline (PANI)/graphene nanosheet (GNS) composites were synthesized through chemical oxidation polymerization by changing the weight ratio of aniline mono-mers. To examine the morphological structure of the composites, scanning electron micros-copy and transmission electron microscopy (TEM) were conducted. TEM results revealed that fibril-likePANI with a diameter of 50 nm was homogeneously coated on the surface of the GNS. The electrochemical properties of the composites were studied by cyclic voltam-metry in 1 M H2SO4 electrolyte. Among the prepared samples, the PANI/GNS (having 40 wt% aniline content) showed the highest specificcapacitance, 528 Fg-1, at 10 mVs-1. The im-proved performance was attributed to the GNS, which provides a large number of active sites and good electrical conductivity. The resulting composites are promising electrode materials for high capacitative supercapacitors.

• Jieun Kim(Department of Chemical and Biochemical Engineering, Pusan National University)
• Soo-Jin Park(Department of Chemistry, Inha University)
• Seok Kim(Department of Chemical and Biochemical Engineering, Pusan National University) Corresponding Author