The Double-Layer Capacitance subnode describes the nonfaradaic currents due to charge and discharge of the double layer situated at the interface between the electrode and the electrolyte. The resulting double-layer current density on the boundary depends on the time derivative of the potentials and is proportional to the Electrical double-layer capacitance Cdl (SI unit: F/m2). For stationary problems, the double-layer current density is zero.

The parent node may be either an Internal Electrode Surface or an Electrode Surface.

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.