Carbon cloth‐MnO2 nanotube composite for flexible supercapacitor

Abstract Three‐dimensional MnO2 nanorods were synthesized on a carbon cloth (CC) via hydrothermal method to fabricate binder‐free electrode for flexible supercapacitor application. The fabricated MnO2/CC electrode exhibits specific capacitance of 487 F g−1 at current density of 2 A g−1 in conventional three electrode system using 1 M Na2SO4 electrolyte. Furthermore, a flexible symmetric supercapacitor is assembled using 1 M Na2SO4 electrolyte which shows maximum specific capacitance of 232 F g−1 at current density of 0.5 A g−1. The supercapacitor exhibits specific energy up to 5.18 Wh kg−1 and specific power of 242 W kg−1 at 0.5 and 1.0 A g−1, respectively. Furthermore, the supercapacitor exhibits specific capacitance retention of 91.7% over 1000 charging discharging cycles. The attractive performance suggests that MnO2/CC supercapacitor has potential application for energy storage.