Fuel cell parameters obtained in a series of electrochemical experiments: polarization curves (60 °C, Rh ∼ 90%), electrochemical impedance spectroscopy, cyclic voltammetry (25 °C).
| Parameter/fuel cell | FC_Ref | FC_T100 | FC_T50 | FC_T200 | FC_TS100 | FC_TS50 | FC_TS200 |
|---|---|---|---|---|---|---|---|
| J max [mA cm−2] (0.25 V) | 325 | 483 | 295 | 429 | 469 | 372 | 482 |
| P max [mW cm−2] | 126 | 217 | 115 | 198 | 195 | 142 | 195 |
| Eff. HHV at Pmax [%] | 35.2 | 35.6 | 34.1 | 37.0 | 37.6 | 34.7 | 36.4 |
| OCVa [V] | 0.99 | 0.99 | 0.98 | 0.99 | 0.99 | 0.99 | 1.00 |
| R electrode b [Ω cm2] | 3.70 | 2.92 | 4.13 | 3.20 | 3.16 | 3.99 | 3.08 |
| R electrolyte c [Ω cm2] | 0.36 | 0.26 | 0.35 | 0.23 | 0.25 | 0.26 | 0.25 |
| ECSAd [m2 g−1] | 24.2 | 63.3 | 14.4 | 31.7 | 46.5 | 25.2 | 25.2 |
a
OCV – open circuit voltage.
b
R electrode – total transfer resistance of mass and charge through the electrode.
c
R electrolyte – ionic resistance of the electrolyte.
d
ECSA – electrochemical surface area.