Mathematical Modeling of Energy-Dense NMC Electrodes: I. Determination of Input Parameters

Physics-based models of the Li-ion battery are promising to decipher and quantify the electrode limitations, thereby providing valuable insights for choosing the optimal electrode design for a specific application. However, to obtain relevant results from the models, a reliable set of input parameters is required. This work presents a combined experimental/modeling approach relying on the Newman pseudo-2D model for a complete characterization of a set of LiNi0.5Mn0.3Co0.2O2 electrodes. Intrinsic properties of the active materials are determined and validated using low-loading electrodes having negligible porous-electrode limitations. Then, high-energy-density electrode properties are characterized using appropriate experimental methods, which are widely reported in the literature. In the second part of this series of papers, parameters obtained from this part serve as input parameters in the Newman pseudo-2D model as well as in its extension in order to simulate the rate capability during discharge of the aforementioned set of high-energy-density electrodes. (C) 2022 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.

Automated summary

Physics-based models of the Li-ion battery can help understand and quantify the electrode limitations, providing valuable insights for optimal electrode design in specific applications. This study presents a combined experimental/modeling approach using the Newman pseudo-2D model to characterize a set of LiNi0.5Mn0.3Co0.2O2 electrodes. The intrinsic properties of the active materials are determined and validated, and the high-energy-density electrode properties are characterized using appropriate experimental methods.