Novel cobalt (II) phthalocyanine with appliance of CNTs on GCE: Flexible super-capacitance by electrochemical methods

Abstract

Enrich-Supercapacitive behavior of a novel functional material, tetra trimethylpyrimidin-2-carboxamide cobalt (II) phthalocyanine (CoTTPCAPc) upon covalent integration with carbon nanotubes (SWCNT and MWCNTs) is reported for the first time. The supercapacitive behavior of the hybrid (CoTTPCAPc/MWCNTs or SWCNTs/GCE) was investigated using cyclic voltametry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy. Using a more reliable cyclic voltametry and charge–discharge method, the CoTTPCAPc/MWCNTs/GCE hybrid exhibited superior geometrical capacitance for 160.12 F/g by CoTTPCAPc/GCE, CoTTPCAPc/SWCNT/GCE (335.2 F/g) and CoTTPCAPc with composite MWCNTs/GC electrode was predicting the excellent capacitance 475.65 F/g in 1 M H2SO4 electrolyte at a scan rate of 50 mV/s. The CoTTPCAPc/MWCNTs/GC electrode gave excellent stability of over 1000 charge–discharge continuous cycling. These results suggest the importance and great potential ofCoTTPCAPc/MWCNTs composites in the applications of high-performance super-capacitance.