Electrochemical models involving mass transport generally benefit from a finer mesh at the electrode surfaces, and at singularities such as the boundary between an electrode surface and an insulating surface. This may be accomplished by adding additional Size mesh nodes for these boundaries only. Also, consider refining the “element growth rate”, and/or using boundary layer meshing in 3D.

Sometimes, a regular Mapped mesh can be more appropriate in a rectangular (2D) domain; such domains are common in cutaway schematic studies of batteries and fuel cells. Similarly the Swept mesh is often appropriate for very thin layers in a 3D model.