A physics-based drift-diffusion approach to model Li-air batteries with organic electrolyte

Drift diffusion models have been used extensively by the semiconductor device research community to provide a physics-based approach for the modeling and simulation of electronic devices under various bias conditions. In this article we develop a model based on the drift-diffusion equations for the simulation of Li-air batteries with organic electrolyte. The model is carefully calibrated and takes into consideration the lithium and oxygen diffusion inside the battery, the electron conductivity of the carbon cathode, the formation and deposition of the Li₂O₂ reaction product, and the porosity change inside the cathode.