Modeling of Li-ion batteries with Highly-Ordered Hierarchical Electrode Design
In this presentation, we examine the role of laser-ablated channels within a thick anode in reducing the ionic transport limitation.2 We apply the porous electrode model3 to simulate the effect of the channels on the ionic concentration gradient and reaction rate, as well as the resultant rate capability of the cell during fast charging. We will describe the model parameterization using three-electrode measurements and the associated challenges. The model results show substantial improvement in the electrolyte salt concentration and homogeneity in the reaction rate because of the channels as compared to that in the conventional electrodes at high charging rates such as 4C and 6C.
- Gallagher, K. G. et al. Optimizing areal capacities through understanding the limitations of lithium-ion electrodes. J. Electrochem. Soc. 163, A138–A149 (2016).
- Kim, Y., Drews, A., Chandrasekaran, R., Miller, T. & Sakamoto, J. Improving Li-ion battery charge rate acceptance through highly ordered hierarchical electrode design. Ionics (Kiel). 24, 2935–2943 (2018).
- Newman, J. & Tiedemann, W. Porous-Electrode Theory with Battery Applications. AIChe J. 21, 25–41 (1975).