Graphene–Single-Walled Carbon Nanotubes–Poly(3-methylthiophene) Ternary Nanocomposite for Supercapacitor Electrode Materials

Abstract

Herein, we report a cost-effective and easy synthetic procedure for the fabrication of a graphene–single-walled carbon nanotube–poly­(3-methylthiophene) ternary nanocomposite for high-performance supercapacitor electrodes. The possible interactions of both graphene (Gr) and single-walled carbon nanotubes (SWCNTs) with poly­(3-methylthiophene) (PMT) were characterized by Fourier transform infrared, UV–visible, and Raman spectroscopies. A morphological study confirmed the formation of a bridge between PMT-coated SWCNTs and Gr layers. The ternary nanocomposite showed superior electrical conductivity of 4.68 S/cm at room temperature and also exhibited nonlinear current–voltage characteristics. The ternary nanocomposite achieved a maximum specific capacitance of 561 F/g at a 5 mV/s scan rate. Both a high energy density and a high power density were obtained for the ternary nanocomposite. Here, both the Gr and SWCNTs take part in the increment of the electrochemical properties. A higher thermal stability was also observed for the ternary nanocomposite. Based on its outstanding properties, the ternary nanocomposite is a potential candidate for a high-performance supercapacitor electrode.

Silver nanoparticles decorated polypyrrole/graphene nanocomposite: A potential candidate for next‐generation supercapacitor electrode material

“…Pure PPy shows the granular like morphology, exhibited in Figure 8(a). 49,50 Figure 8(e,f) shows the HRTEM images of Ag-PPy/Gr nanocomposite at different positions. The rough surfaces of Gr also signify the uniform coating.…”

Facile synthesis of porous Ni2CO3(OH)2/functionalized graphene composites with enhanced supercapacitive performance

“…49 Please do not adjust margins process limits full diffusion and migration of active ions in electrolytes into active substances in electrodes, the specific capacitance of NCB/FGN composites gradually decreases to 721 F g -1 at a current density of 5 A g -1 . 49 Please do not adjust margins process limits full diffusion and migration of active ions in electrolytes into active substances in electrodes, the specific capacitance of NCB/FGN composites gradually decreases to 721 F g -1 at a current density of 5 A g -1 .…”

“…49 Fig. The power density(P) was also calculated from the chargedischarge profiles using the equation: P=E/t, where t is the discharge time acquired from charge-discharge profiles.…”

Polythiophene Grafted onto Single‐Wall Carbon Nanotubes through Oligo(ethylene oxide) Linkages for Supercapacitor Devices with Enhanced Electrochemical Performance

“…In the previous reports, most of PTh‐SWCNTs composites were prepared by the direct blending, in‐situ chemical oxidative polymerization, and electrochemically synthesis. However, only weak interconnections by Van der Waals forces and hydrogen bonds were found between the two constituents by these conventional methods, which render poor compatibility as well as poor capacitance like previously reported PTh/MWCNT and PEDOT/MWCNTs composites . On the other hand, covalent functionalization of SWCNTs with PTh have been proved to realize an effective charge transfer process and enhance ionic transport .…”