fig9
Figure 9. (A) I-V and I-P curves in fuel cell (FC) mode at 700 °C with humidified H2 (3 vol.% H2O) or CH4 fuel. (B) I-V curves in electrolysis cell (EC) mode with humidified H2 fuel (3 vol.% H2O). Both for R-PBMN-BZCYYb|BZCYYb|PBSCF-BZCYYb cells. (C) Short-stability under stepped voltages. (D) Reversible cycling operation at 650 °C (current densities of 0.4-0.1 A cm-2). (E) Long-term operational stability at ±0.4 A cm-2 in FC/EC modes.
