Comparing the gravimetric energy densities for cells with ΦCAM = 0.32, 0.51 and 0.74 as a function of the practical rate (Eq. 6), it becomes evident that the gravimetric energy density can be significantly increased from 11.4 to 41.4 Wh•kg -1 by increasing ΦCAM and the cathode thickness L (Figure ) at low rates. This is, because the areal loading of the cathode is increased from 1.8 to 7.3 mAh•cm -2 , while the simultaneous cathode utilization decrease is negligible in comparison in agreement with the 𝛿-parameter analysis (Figure ). Nonetheless, this strong energy density increase is relativized going to higher rates, i.e., higher applied current densities (overview in Table ). At higher rates, and with that upon increasing 𝛿 significantly, the energy densities of all investigated cells start to converge to ≈5 Wh•kg -1 given the systematic decrease of the rate capability (Figure ) when increasing the areal loading of the cathode.