Graphit vs. Sodium Titanate: Diffusion Properties of Negative Electrodes Materials

Abstract

This work deals with the research of intercalating properties of negative electrode materials for lithium-ion and sodium-ion batteries. The main focus of this work is on the kinetic aspects associated with the diffusion processes of lithium in the graphitic negative electrode material and sodium in titanate materials in relation to the electrochemical parameters. By comparing the materials in terms of kinetic properties expressed by the diffusion coefficient via electrochemical impedance spectroscopy in the state of the base material and after creating the passive film on the electrode, it is possible to determine the application range of the materials and their dependence on the electrochemical parameters. Within the experimental part, the structural and electrochemical parameters and diffusion coefficients of the studied materials are determined by the proposed method.