A default Electrode Reaction node is added to the Internal Electrode Surface or Electrode Surface physics nodes. Use the Electrode Reaction feature to define the electrode kinetics for the charge transfer reaction that occurs between the electrolyte and a nonporous electrode. Additional subnodes are available from the context menu (right-click the parent node) or from the Physics toolbar, Attributes menu.

See the Electrode Reaction node in Shared Physics Features in the Current Distribution Interfaces for a general description of the Equilibrium Potential, Electrode Kinetics and Stoichiometric Coefficients sections.

In addition to the kinetics expression types described in the link above, two additional kinetics expressions are available in the Lithium-Ion Battery interface.

The Lithium metal expression can be used to define a lithium metal deposition/dissolution reaction.

The Insertion Reaction expression can be used for modeling a heterogeneous porous electrode — that is, when the individual electrode particles are resolved in the model and defined on the boundaries to the electrolyte domain.