Use the Internal Electrolyte Contact Resistance node as a subnode to the Electrolyte Phase to specify a Contact resistance at an interior boundary of the domain selection of the Electrolyte Phase. The contact resistance is modeled by adding slit boundary conditions. The slit boundary defines separate degrees of freedom for the electrolyte potential at the up and down sides of the slit boundary, and then adds current density (Neumann) conditions at both the up and down side. This node is unavailable if Solve for electrolyte phase potential is cleared in the interface top node.