Electrodeposition Module UpdatesFor users of the Electrodeposition Module, COMSOL Multiphysics ® version 5.2a brings a new Thermodynamic Equilibrium electrode kinetics type that lets you assume zero overpotential in your simulation. Now, you can also add Film Resistances and Dissolving-Depositing Species types to your simulation, which are useful for modeling porous and edge electrodes. Learn more about the updates to the Electrodeposition Module below.
New Nernst-Planck-Poisson Equations Interface
The new Nernst-Planck-Poisson Equations multiphysics interface can be used to investigate charge and ion distributions within an electrochemical double layer, where charge neutrality cannot be assumed. The Nernst-Planck-Poisson Equations interface adds theElectrostatics and Transport of Diluted Species interfaces to a model, together with predefined couplings for potential and space charge density.
The concentration of a cation (blue) and an anion (green) close to the electrode surface at x = 0. The sum of charges deviates from 0 close to the surface, forming a diffuse-charged double layer.
New External Short Boundary ConditionThe new External Short boundary condition lets you short circuit Electrode Surfaces, Porous Electrodes, and Electrodes through an external lumped resistance. The new boundary condition is suitable for studying short circuiting in batteries, for instance, or for interconnecting large, electrochemically active objects in corrosion protection problems.
New Electrochemical Heat Source Multiphysics Node
The new Electrochemical Heat Source multiphysics interface offers an optional way to couple the electrochemical heat sources with a heat transfer interface.
New Thermodynamic Equilibrium Kinetics Type
Electrode reactions now support a new Thermodynamic Equilibrium electrode kinetics type (known as Primary Condition in the Secondary Current Distribution interface), which assumes zero overpotential (negligible voltage losses).
New Support for Film Resistance and Dissolving-Depositing Species in Porous and Edge Electrodes
The Porous Electrode and Edge Electrode nodes now support the addition of Film Resistances and Dissolving-Depositing Species. Previously, this was only supported in the Electrode Surface feature. Film resistances and dissolving-depositing species in porous electrodes can, for instance, be used to model solid-electrolyte-interphase (SEI) formation in lithium-ion batteries.