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Table 4 Specific areal capacitance and ESR of nanostructured electrodes calculated from charge-discharge curves measured at 1 -2

From: Vertically aligned ZnO nanorod core-polypyrrole conducting polymer sheath and nanotube arrays for electrochemical supercapacitor energy storage

Nanostructure electrode Csd( ESR (Ω.cm2)
ZnO nanorod core-PPy sheath 131.22 40.5
Narrow PPy nanotube (2-h etch) 132.28 25.08
Open PPy nanotube (4-h etch) 141.09 32.09