With the goal of creating a model of a Li-Air battery that is consistent with voltammetry data, we develop a full battery model capable of giving insight into details of cell operation otherwise inaccessible to common experimental techniques. With this model, we investigate the dependence of the current on: The diffusion characteristics of the electrolyte, the solubility of the ambient oxygen, the structure of the cathode, and aspects of the primary surface reaction.We explore modifications to a basic reaction-diffusion model of a full cell that bring better agreement with experimental data, including gas-electrolyte surface limited diffusion and a partially active cathode. We discuss how the basic form of the model and the simulated reaction and concentration profiles affect cell dynamics.
Jones, R. E., Gittleson, F. S., Templeton, J. A., & Ward, D. K. (2017). A simple model for interpreting the reaction-diffusion characteristics of Li-Air batteries. In Journal of the Electrochemical Society (Vol. 164, pp. A6422–A6430). Electrochemical Society Inc. https://doi.org/10.1149/2.0641701jes