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:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
- COMSOL Multiphysics® and
- either the Battery Design Module, Corrosion Module, Electrodeposition Module, or Fuel Cell & Electrolyzer Module
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Tabella delle Funzionalità and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.