Table 2.
Electrical parameter values that were obtained from fitting the impedance spectra of different electrodes.
| Electrodes |
Rs (10−3) (kΩ·cm2) |
CPE1 (µF) |
n 1 |
Rct (10−3) (kΩ·cm2) |
CPE2 (µF) |
n 2 |
Rad (10−3) (kΩ·cm2) |
χ2 (10−4) |
|---|---|---|---|---|---|---|---|---|
| ZnO | 66.4 | 7.2 ± 0.1 | 0.98 | 706.9 ± 0.2 | 2.6 ± 0.1 | 0.98 | 2520.3 ± 0.2 | 5.56 |
| Cu0.01Zn0.99O | 64.8 | 8.6 ± 0.2 | 0.99 | 636.2 ± 0.2 | 6.4 ± 0.1 | 0.99 | 2028.6 ± 0.1 | 7.26 |
| Cu0.02Zn0.98O | 47.9 | 19.1 ± 0.1 | 0.98 | 569.3 ± 0.1 | 9.9 ± 0.1 | 0.97 | 1327.8 ± 0.1 | 5.12 |
| Cu0.03Zn0.97O | 25.2 | 34.5 ± 0.1 | 0.97 | 542.6 ± 0.1 | 13.9 ± 0.1 | 0.97 | 990.3 ± 0.2 | 2.89 |
| Cu0.04Zn0.96O | 17.5 | 35.6 ± 0.2 | 0.99 | 302.9 ± 0.1 | 15.7 ± 0.2 | 0.99 | 810.5 ± 0.1 | 3.74 |