Figure 9

Concentration profiles of the oxygen ions along the rotational axis of the device for a 2D rotational symmetric simulation with basic parameters (see Table 1) and a BE with \((1.0\times 10^{-6}\,\hbox {m})^2\). The BE is at 0 m while the TE is at \(1\times 10^{-7}\) m. This is only the first quarter of a steady I–V curve.