Table 2.
Equivalent circuit parameters obtained from fitting the EIS data. CPET is the amplitude of the constant phase element. CPEP values are related to the resistance or capacitive nature of the CPE (values closer to 0 correspond to an ideal resistor, values closer to 1 correspond to an ideal capacitor).
| Electrode Material | RΩ (Ohm) | RCT1 (Ohm) | CPET-CPEP 1 | RCT2 (Ohm) | CPET-CPEP 2 | ||
|---|---|---|---|---|---|---|---|
| VGNWs | 2.19 | 1.86 | 0.003 | 0.68 | 4.59 | 0.012 | 0.54 |
| Planar W₂C/WOx film | 1.23 | 0.17 | 0.001 | 0.99 | 4.53 | 0.008 | 0.67 |
| bulk W₂C/WOx on VGNWs | 1.95 | 0.16 | 0.001 | 0.96 | 3.46 | 0.012 | 0.67 |
| W₂C/WOx NPs on VGNWs | 1.04 | 0.11 | 0.00 | 1.00 | 1.49 | 0.013 | 0.66 |
Toc