Use the Porous Matrix Double-Layer Capacitance subnode to define a nonfaradaic double-layer current density at the interface between the porous electrode matrix and the electrolyte. The node can be added as subnode to a Porous Electrode node.

The resulting double-layer current source in the Porous Electrode domain depends on the time derivative of the potentials and is proportional to both the Electrical double-layer capacitance Cdl (SI unit: F/m2) and the Double-layer area av,dl (SI unit: 1/m).

Use the settings of the Stoichiometry section (not available in the Primary or Secondary Current Distribution interfaces) to control what species are participating in the double-layer charging — that is, the mass exchange between the double layer and the electrolyte outside the double layer.