Study of the Effect of Electrode Microstructures on Battery Performance

Battery performance reflects the transport and kinetics of related species within the microstructures of battery’s electrode. However, the current homogenized battery models lack detailed morphology of the internal structures of electrodes. In this work, a multiscale battery simulation tool is developed. This model is capable of capturing the impact of microstructures of electrodes on battery performance, by adapting the variational multiscale principle. The developed model is verified through the direct numerical solutions, and compared with the conventional pseudo-2D (P2D) model method. The model has revealed more dynamic battery behaviors related to the variation of the microstructure, such as particle shape, tortuosity, and material composition, while the corresponding result from P2D shows a monotonous change within different structures.Copyright © 2015 by ASME