An alternative strategy for suppressing unfavourable short-range ordering in disordered rock salt cathode materials is to substitute many different species on the cation sublattice, creating a "high-entropy" material. This approach, first proposed by Lun et al. , was inspired by the homogeneous cation distribution observed in high-entropy oxides . While not the first work to successfully synthesize high-entropy disordered rock salt lithium-ion cathode materials the first to link the performance of these materials to short-range order suppression. By increasing the number of species on the cation sublattice, they observed an increase in first-cycle capacity. This was linked a suppression of short-range ordering validated by electron diffraction experiments which showed a reduction in diffuse short-range order scattering as the number of transition metals in the sample was increased. Alternatively, this can be seen as an increase in cation configurational entropy. The short-range order suppression was then linked to an increase in the size of the long-range lithium percolation network by cluster-expansion-driven Monte Carlo simulations.