The exploration and optimisation of novel chemistries for lithium-ion cathode materials remains a vast area of research for the materials science community owing to the crucial role of electrochemical energy storage in transitioning to a low carbon economy. Disordered rock salt lithium-ion cathodes are an emerging materials class in this area . These materials share the close-packed oxygen framework present in most commercial lithium-ion cathode materials such as the layered rock salt cobalt-and nickel-rich structures conferring an excellent mass-to-charge ratio and volumetric efficiency. While performant, layered cobalt and nickel rich structures have poor long-term techno-economic prospects . This is in contrast tofor example-manganese and iron which are cheaper and more abundant, but their layered structural analogues are not stable over many intercalation cycles .