shows that Li5.5PS4.5Cl1.5-Li2FeS2 cathodes with high volume fractions of CAM can be realized successfully. Moreover, the achievable areal capacities can be increased further with the thickness of the cathode. Nonetheless, fast charging is desired for application and the rate capability of the electrodes needs to be considered. Therefore, electrodes with ΦCAM = 0.32, 0.51 and 0.74 (L ≈ 80 μm), and with L = 73, 110 and 145 μm (for ΦCAM = 0.74) have been tested for five cycles per current density step, starting with a current density corresponding to the theoretical rate of 0.134 C (respective current densities listed in Table ). Subsequently, the applied current density was stepwise changed between 0.6 mA•cm -2 and 5.1 mA•cm -2 . This routine was chosen to compare the composites at constant current densities despite changes to the cathode loading and with that the C-rates. The average capacity QCAM of the five charge cycles per current density step, and the average of triplicates as well as their standard deviation, are considered in the following discussion. The rate retention as a function of the applied current density is shown in the Supporting Information (Figure ).