Silicon–Graphite-Blended Electrode with Thermodynamic Voltage Hysteresis
Application ID: 116001
Due to its high capacity, silicon (Si) is often added to graphite in the negative electrode of lithium-ion batteries.
Silicon–graphite blended electrodes may exhibit significant thermodynamic voltage hysteresis (“path dependence”) because the equilibrium potential of the lithium–silicon intercalation reaction is dependent on the charge–discharge history of the electrode.
This model example demonstrates how to add Si as an Additional Electrode Material to a Porous Electrode in the Lithium-Ion Battery interface and how to define a memory variable capable of handling the voltage hysteresis using an additional Coefficient Form PDE interface.
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:
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 Specification Chart 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.