Tony Chung, Purdue MSE BMSE 2011 (RE Garcia, advisor), has numerically simulated the intercalation of lithium at a spatial resolution below 100 nanometers in order to help explain the experiments performed ORNL and ISP (Ukraine). Here, AFM, FEM, and semi-analytical models are combined to analyze the local intercalation of single grains and grain boundaries during battery cycling. This basic science study sheds light into how the grain microstructure impacts the macroscopic power density of industrially used systems. The developed knowledge provides feedback to improve understanding of the nanoscale mechanisms underpinning lithium-ion battery operation.