Internal Electrode Surface
Use the Internal H2 Electrode Surface or the Internal O2 Electrode Surface nodes to define an internal electrode surface located at boundaries adjacent to both an exterior boundary of an H2/O2 Gas-Electrolyte Compartment domain and an exterior boundary of an Electronic Conducting Phase domain.
Film Resistance
Use a film resistance if you want to include an additional potential drop due to an ohmic resistance at the interface between the electrode and the electrolyte (a contact resistance), for instance due to build-up of insulating deposits.
Specify either a Surface resistance Rfilm (SI unit: Ω·m2) directly or choose the Thickness and conductivity option to calculate the surface resistivity based on a depositing film thickness.
Specify the electrode reaction using Electrode Reaction child nodes.