改良型吸着種領域モデルに基づくSOFC多孔質燃料極の過電圧解析

抄録

Detailed overpotential properties of Ni/YSZ (yttria-stabilized zirconia) anode of SOFC (solid oxide fuel cell) were studied based on improved species territory adsorption model, an analytical model of hydrogen oxidation reaction. The variation of each term of model-based overpotential expression indicates that overpotential dependence on hydrogen partial pressure, water vapor partial pressure, and temperature can be mainly explained by the change of limiting current density, equilibrium constant, and equilibrium potential. In addition, the sensitivity analysis of the model showed that the enthalpy related to the oxygen migration process and the oxygen coverage on YSZ have a great impact on current density and anode overpotential.