The Electrolyte Phase node solves for the electric potential (V) as dependent variable.

The current density in the phase, il (A/m2), is defined as (Ref. 1)

where σl, eff is the effective electrolyte conductivity (S/m).

where iv,tot (A/m3) is the sum of a volumetric current density contributions of the electrode reactions occurring in the Gas Diffusion Electrode domains.

For Membrane, Separator and Gas-Electrolyte Compartment domains