Intercalation Strain

Intercalation strain is an internal volumetric strain that occurs as a result of the insertion of species (atoms) into interstitial sites of a host electrode material, for instance intercalation of lithium atoms in graphite in lithium-ion battery electrodes.

For small strains, the strain tensor is

Here, ΔV is the change in volume, and V0 is the reference volume. I is the identity tensor.

The subnode is only available with the Battery Design Module, see https://www.comsol.com/products/specifications/).

Select how to define the , ΔV/V0, — or .

When is selected, the material property is used. The dependency on the concentration is then passed to the material using the input in the section.

For , enter an expression for the volumetric strain as function of a concentration variable. As the strain is given explicitly, such an expression should be a function of a concentration variable.

Location in User Interface

Context Menus

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Physics tab with node selected in the model tree: