Table 1.
Electrochemical properties of PEDOT and PEDOT–CNT electrodes of different film thicknesses in comparison with TiN and Au.
| Au (planar) | TiN (nano-porous) | PEDOT | PEDOT–CNT | |||||
|---|---|---|---|---|---|---|---|---|
| Q/nC passed during deposition | – | – | 200 | 400 | 600 | 200 | 400 | 600 |
| Thickness/nm, n = 18 | n.a. | 550 ± 50 | 247 ± 33 | 392 ± 36 | 480 ± 43 | 352 ± 27 | 505 ± 63 | 638 ± 78 |
| |Z| @ 1 kHz/kΩ, n = 24 | 329 ± 33 | 52.3 ± 4.6 | 20.0 ± 1.89 | 20.3 ± 2.36 | 20.0 ± 2.13 | 16.2 ± 1.07 | 15.7 ± 1.46 | 15.5 ± 1.19 |
| C/mF cm−2[a], n = 12 | 0.04 ± 0.01 | 0.91 ± 0.10 | 2.4 ± 0.09 | 3.6 ± 0.31 | 4.8 ± 0.24 | 2.4 ± 0.09 | 3.7 ± 0.33 | 4.8 ± 0.27 |
| C/mF cm−2[b], n = 24 | 0.25 ± 0.03 | 1.8 ± 0.2 | 3.7 ± 0.07 | 5.3 ± 0.17 | 6.9 ± 0.16 | 4.0 ± 0.11 | 5.7 ± 0.11 | 7.5 ± 0.12 |
| Q/mC cm−2[c], n = 4 | – | 0.45 ± 0.12 | – | – | 0.81 ± 0.05 | – | – | 1.21 ± 0.02 |
Values are given as mean ± SD.
[a] Obtained from fitting of impedance spectra, [b] obtained from cyclic voltammetry, i.e., possibly comprising contributions from redox processes and sampling slow mass transport processes, [c] obtained from charge transfer experiments with an amplitude of 0.5 V.