The observations of the GCD profiles via Route A (0.001-2.5 V) directed our attention to the control of discharge depth and its effect on K storage mechanism in MoS2. Since the layered structure was retained at >0.2 V potassiation and amorphous discharge products were formed at <0.2 V potassiation, we kept the discharge depth at 0.001 V in the 1 st cycle but changed it to 0.2 V from the 2 nd cycle and onwards (denoted as Route B: 0.001-2.5 V in the 1 st cycle and 0.2-2.5 V from the 2 nd cycle in Figure ). Figure shows the GCD profiles via Route B and the XRD patterns of the MoS2 electrodes at various stages of the cycles are shown in Figure . The GCD profiles share similarities with those via Route A, including the three defined plateau regions in the first discharge curve and the sloping curves in the following cycles. The similarities can also be seen from the CV curves via the two routes (Figure ), showing similar voltages of reduction and oxidation peaks. No crystalline phase(s) was recovered via Route B and (de)potassiation product(s) remained amorphous judging from the XRD patterns.