Table 3: The parameters used to fit the EIS Nyquist plots of the three devices in Figure 9.

TiO2 electrode T20 T20 + RSP T37 + T20 + RSP (ohm) 19.87 21.02 20.14 (ohm) 15.19 14.97 15.12 CPEPt (Q/α) 1.66 × 104/0.73 1.50 × 104/0.72 1.61 × 104/0.78 (ohm) 43.32 34.35 32.24 (F) 1.15 × 10−4 1.39 × 10−4 7.63 × 10−5