For numerical reasons, the electrical conductivity of the current collectors and the lithium reservoir used in the simulations should be limited to 1000 S/m instead of using the physical conductivities of the metals, to avoid large contrasts in electrical conductivities in the battery structure. 1000 S/m is a sufficiently high value for the electrical conductivity to not be a limiting factor during the charging simulations. Reducing the electrical conductivities to this value will not influence the overall battery performance but allowing a faster convergence of the solver. In some cases, when the electron conductivity of the electrode (active material and binder network) is very low, the conductivity contrast  to the current collectors is very high and the simulation might diverge. In this case, it may help to decrease the conductivity values for the current collectors even further.

Therefore, the lithium reservoir and Manual materials for the current collectors have 1000 S/m as electrical conductivity by default. If the material for the current collector is not set to Manual, but to a material from the Material Database (e.g. copper or aluminum), make sure that the Material Law Current Collector is selected for the electrical conductivity to limit the electrical conductivity to 1000 S/m.

For the separator, always 0 S/m is shown as a default value on this tab. This value has no influence on the simulation. In case the porosity of the separator is not modelled, it gets the same ionic conductivity as the electrolyte. In case the separator is modelled as porous material, you define its ionic conductivity using the settings in the dialog Separator Model Parameters.