With that, it can be assumed that the decrease of rate performance with areal loading (Figure ) can at least be partly explained by the onset of reaction rate nonuniformities at higher rates (Figure ). Nonetheless, it must be noted that QCAM cannot be unambiguously related to δ. An overview of all QCAM(ΦCAM, L, i) as a function of δ(ΦCAM, L, i) is shown in the Supporting Information (Figure ). Other factors such as poor ionic contacting of the CAM at high ΦCAM and the increased likelihood of isolated CAM regions in thick electrode configuration can contribute to the decreased cathode utilization and rate performance additionally and are not captured by the δ-parameter analysis.