Examining only the mean behaviour in the change in activate lithium as a function of n M disguises the strongly different responses for each value of x. Figure shows the average value decomposed into the individual values of x: lower values of x have a much stronger increase in the percolating lithium fraction as a function of the number of transition metals in the simulation cell. This suggests any shortrange order suppression observed in "high-entropy" disordered rock salt cathode will be highly dependent on the lithium and fluorine content and warrants further investigation. This dependence is highlighted in Figure which shows analysis of simulations on the system Li 1 + x MO 2 F x over a wider value of x (x ∈ {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1}). This is done for M = Mn (n M = 1) and M = Mn 0. To explain these observations we note the lithium excess and fluorine substitution level are not necessarily coupled and extend the previous Monte Carlo simulations on the system Li 1 + x MO 2 F y , i.e. the lithium excess, x, and fluorine content, y, are now varied independently between 0.2 and 1 in the n M = 1 and n M = 5 systems examined previously. Figure A and B confirm that the active lithium fraction in the 5-TM system for the equivalent x and y is generally higher. The difference between Figure A and B, shown in Figure , highlights that the increase in active lithium fraction from the 1-TM system to the 5-TM system is non-uniform as x and y are varied. The increase is minimal at high x and y, and shows a coupled dependence on lithium and fluorine contents at intermediate com- positions. Increasing the fluorine content (increasing y) decreases the value of x for which the change between the 1-TM and 5-TM systems is at a maximum. This strong dependence on short-range order suppression by increased cation substitution on the lithiumexcess and fluorine content can be understood by considering the cation-anion bonding preferences. The orbital overlap between transition metal d-states and oxygen 2p states will be much stronger than any interaction between the transition metal ions and the fluorine. This general chemical insight is reflected in the cationcoordination preferences observed in multiple previous Monte Carlo studies of transition metal oxyfluoride disordered rock salt cathode materials, with lithium having an above-average number of fluorine nearest neighbors, and transition metals coordinating to a higher number of oxide ions .