One lithium-ion solid electrolyte for which a number of aliovalent doping schemes have been proposed is the antiperovskite Li 3 OCl . OCl has been widely studied following initial reports of room-temperature ionic conductivities up to ∼1 × 10 -3 S cm -1 . This reported high ionic conductivity is notable because the lithium ions in Li 3 OCl are crystallographically ordered; this is in contrast to other high-ionic-conductivity lithium-ion solid electrolytes, such as lithium garnets and lithium thiophosphates, in which lithium is disordered, with this disorder thought to be integral to their fast ion diffusion .