Apparent Increasing Lithium Diffusion Coefficient with Applied Current in Graphite

• Published in: Journal of the Electrochemical Society Vol. 167; no. 12; pp. 120528 - 120537
• Main Authors: Dees, Dennis W., Rodrigues, Marco-Tulio F., Kalaga, Kaushik, Trask, Stephen E., Shkrob, Ilya A., Abraham, Daniel P., Jansen, Andrew N.
• Format: Journal Article
• Language: English
• Published: United States IOP Publishing 28.08.2020
• Subjects: ENERGY STORAGE; graphite electrode active material; lithium diffusion rate; lithium-ion battery

In this study, we assert that the apparent lithium diffusion coefficient in graphite active particles in the negative electrodes of lithium-ion cells increases appreciably with the intercalation rate. This assertion is based on an electrochemical model analysis of a wide range of electrochemical mic...