Lithium-Sulfur Battery

Application ID: 80721

Lithium-sulfur (Li-S) batteries are used in niche applications with high demands for specific energy densities, which may be as high as 500-600 Wh/kg.

The chemistry is fairly complex, since multiple polysulfide species participate in the various charge transfer reactions. The chemistry also involves chemical precipitation-dissolution of multiple solid species.

This example models discharge of a Li-S cell at two different discharge rates. The electrolyte charge and mass transport of a lithium salt and 6 polysulfides is included, as well as the precipitation-dissolution of solid octasulfur (S8) and lithium sulfide (Li2S) in the separator and positive electrode.

This model example illustrates applications of this type that would nominally be built using the following products: