A Simple Model for Interpreting the Reaction–Diffusion Characteristics of Li-Air Batteries. Issue 1 (26th January 2017)

• Record Type: Journal Article
• Authors: Jones, R. E.; Gittleson, F. S.; Templeton, J. A.; Ward, D. K.
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 1(2017)
• Page Start: A6422
• Page End: A6430
• Publication Date: 2017-01-26
• Subjects: Diffusion -- Li-air -- model -- Reaction -- voltammetry; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0641701jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : 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.