Dynamic Optimization of Solid Oxide Electrolysis Cell Based on Oxygen Partial Pressure Safety

Hydrogen production technology and energy storage technology of solid oxide electrolytic cell (SOEC) are widely used. However, SOEC has a serious performance degradation caused by oxygen electrode delamination under dynamic working conditions. To deal with this problem, the SOEC oxygen partial pressure model is built in this paper. Afterward, Dynamic optimization of SOEC is studied. Three different current switching schemes are compared. The simulation result shows that the linear scheme is better. In order to further reduce the oxygen partial pressure overshoot, a two-stage linear current density switching scheme was developed. The determination of linear slope is very important. By gradually reducing the slope, it is finally concluded that when the slope of the first stage is set to 16.2, the oxygen partial pressure overshoot of SOEC is the smallest, which is the optimal scheme.