Internal diffusion electrode-electrolyte contact shape and microstructure effect on Solid Oxide Fuel Cells (SOFC) oxygen reaction.

In this work we have studied the elemental electrode shape and electrode - electrolyte contact microstructure influence of Internal diffusion (ID) gas electrode in solid oxide fuel cells (SOFC). First the influence over the e lectrolyte effective resistance is studied. Then the influence of the shape of the elemental contact grain of ID electrode is also studied. Finally th e influence of the electrode - electrolyte contact microstructure in the el ectrode response for a pure diffuse control is modelled. From the obtained results, conclusions on the contact microstructure and electrode shape infl uence over the oxygen reaction of this kind of gas electrodes are commented .