A Novel High-Performance Supercapacitor based on Chitosan/Graphene Oxide-MWCNT/Polyaniline

Chitosan/Graphene Oxide-MWCNT/polyaniline (CS/GM/PANT) ternary nanocomposite has been synthesized via in situ polymerization of aniline in the presence of CS/GM. The Morphology of nanocomposites was studied by Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy, as well as X-ray photoelectron spectroscopy (XPS). Furthermore, the supercapacitive behavior of the CS-based samples was investigated using cyclic voltammetry (CV), galvanostatic charge-discharge (CD) and electrochemical impedance spectroscopy (EIS) techniques in 0.5 M Na2SO4. It is found that the CS/GM/PANI nanocomposite displays much higher specific capacitance along with better cycle stability than those of CS and CS/GM. The specific capacitance of 609.2 F g(-1) (48.5 m F cm (-2)) was obtained for the CS/GM/PANI at a scan rate of 10 mV s(-1). In addition, the synthesized nanocomposite retained 96% of the initial capacitance after 500 cycles of charge-discharge at a current density of 5 Ag-1. The improvement in the supercapacitive behavior of CS/GM/PANI may be attributed to the porous structure and pseudocapacitive mechanism of charge-storage. (C) 2017 Elsevier Inc. All rights reserved.