Diffusion Coefficients and Kinetic Rate Constants of Phase Changing Electrode Materials using Physics-based Models: A Descriptive Study

 Weppner and Huggins’ 1977 model for the simplified gravimetric intermittent titration technique (GITT) model is still widely used to calculate the electrochemical kinetic rate constant and solid-state diffusion coefficient ( ). However, more modern models have emerged that make use of the greater availability of computer power and are theoretically descriptive. Understanding internal battery dynamics, in particular the charge transport pathways in porous electrodes, is necessary to create better batteries. Solid-state diffusion, which controls rate in lithium-ion battery (LIB) and sodium-ion battery (SIB) electrodes, is often the slowest process. Therefore, in order to design battery electrodes for optimum power and energy efficiency, it is essential to comprehend the kinetic rate constant (k) and the solid-state diffusion coefficient (D1).

Author(s) Details:

Kudakwashe Chayambuka,

Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands and VITO, Boeretang 200, 2400 Mol, Belgium and EnergyVille, Thor Park 8310, 3600 Genk, Belgium.

Grietus Mulder,
VITO, Boeretang 200, 2400 Mol, Belgium and EnergyVille, Thor Park 8310, 3600 Genk, Belgium.

Dmitri L. Danilov,
Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. Forschungszentrum Julich, Fundamental Electrochemistry (IEK-9), D-52425 Julich, Germany.

Peter H. L. Notten,
Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands and Forschungszentrum Julich, Fundamental Electrochemistry (IEK-9), D-52425 Julich, Germany and Centre for Clean Energy Technology, University of Technology Sydney, Broadway, Sydney, NSW 2007, Australia.

Please see the link here: https://stm.bookpi.org/RDST-V10/article/view/7726

Keywords: Kinetic rate, Gravimetric Intermittent Titration Technique (GITT), Lithium-ion Battery (LIB).

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