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Table 3 The Zparameter calculated from the simulated exponent p and CPE Q values and the measured Zvalues

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

Nanostructure electrode SimulatedZ' ' CPE nr mhos. cm - 2 s - p MeasuredZ' ' CPE nr mhos. cm - 2 s - p Percentage deviation
ZnO nanorod core-PPy sheath 11.8 7.7 34.7
Narrow PPy nanotube (2-h etch) 11.2 7.15 36.1
Open PPy nanotube (4-h etch) 9.59 6.50 32.2