Use the Electrolyte node to define an electrolyte domain that only conducts current in the ion conducting phase. The combined charge and mass transfer in the electrolyte is defined by the node.

The Convection section is available when the Convection check box is selected on the interface top node. The Velocity field u (SI unit: m/s) of the solvent is specified as a feature input. Select the source of velocity field from the velocity field list.

The Electrolyte conductivity, σl (SI unit: S/m), parameter will define how the current in the domain depends on the gradient of the potential and the concentration variable, the Diffusion coefficient (SI unit: m2/s), defines how the flux of ions relates to concentration gradients, and the Transport number t+ (also called transference number), which by default is set to 0.363 (a typical value for li-ion batteries), specifies how much of the charge is carried by the positive ions.

Use the Activity dependence on concentration parameter to modify the ion activity. The default is 1(dimensionless).

For the Battery with Binary Electrolyte interface, also enter the Solution density ρ (SI unit: kg/m3) (the electrolyte density). The default is 1.293e3 kg/m3 (A typical value for a KOH electrolyte).

Note that the electrolyte in this case does not refer to the pore electrolyte in porous electrodes (which should be defined by a Porous Electrode node instead). For porous separators, use the Separator instead.