Electrochemical behavior of GNP/CNT porous composite for supercapacitor
Niranjan Pandit, Pushpender Singh, Suraj Prasad, Anup Kumar Keshri, Máté Czagány, Szabolcs Hompoth, Zoltán Gácsi, Péter Baumli
Abstract
Herein, we systematically demonstrate the synergistic behavior of GNP/CNT composite as an electrode material. Uniform dispersion of CNTs effectively inhibits the restacking of GNP sheets, resulting in enhanced specific surface area, porosity, and conductivity. Moreover, CNT intercalation provides a porous and interconnected network for electrolyte ion transportation. As a result, GNP composite having 1.0 wt% multi-walled carbon nanotube (MWCNTs) shows specific capacitance up to 143 Fg −1 at 5 mVs −1 , an improvement of 150% compared to pristine GNPs. The improved electrochemical performance implies that the proposed composite electrode is a promising candidate for supercapacitor application.