Table 1. Fitting Parameters of Equivalent Circuita.
| electrode | Rs (Ω·cm2) | R1 (Ω·cm2) | R2 (Ω·cm2) | CPE1 (mF) | CPE2 (mF) | Wd (Ω·cm2) | errors (%) |
|---|---|---|---|---|---|---|---|
| PPy | 0.6117 | 3.441 | 0.9217 | 5.066 × 10–4 | 2.766 × 10–3 | 0.0932 | 6.135 |
| PPy/GO | 0.3104 | 1.626 | 0.9449 | 3.783 × 10–3 | 3.641 × 10–3 | 0.0850 | 4.519 |
a
Rs is the solution resistance, R1 is the charge-transfer resistance of the electrode material, CPE1 is the specific capacitance value of the electrode material, R2 is the charge-transfer resistance of the nickel foam, CPE2 is the specific capacitance value of foamed nickel, and Wd is for the diffusion resistor.