Fig. 3From: Ultrafine MnO2 Nanowire Arrays Grown on Carbon Fibers for High-Performance Supercapacitors a CV curves of the CF@MnO2 NWA electrode under different scan rates. b Galvanostatic charge-discharge curves of the CF@MnO2 NWA electrode at different current densities. c Specific capacitance of the CF@MnO2 NWA electrode as a function of the current density. d Galvanostatic charge-discharge curves of the CF@MnO2 NWA and the bare CF at a current density of 1 A g−1 Back to article page