Use the Porous Matrix Double Layer Capacitance subnode to define a non-faradaic 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).