While similar discharge capacities with high cyclic stability has been reported before for materials such as Sr3Fe2O5F2 or La1.2Sr1.8Mn2O7-δFx , both of these materials were discharged to -1.5 V vs. Pb/PbF2, which sets the data presented in this work apart, since all capacity was able to be provided in a well expressed plateau at ~0.6 V vs Pb/PbF2.