A hydrated strontium cobalt oxyhydroxide Ruddlesden-Popper phase as an oxygen electrocatalyst for aqueous lithium-oxygen rechargeable batteries.

This study investigates oxygen electrocatalytic activities of perovskite-related compounds using a rotating disk electrode technique in an aqueous solution containing lithium chloride and lithium hydroxide. A hydrated oxyhydroxide Ruddelesden-Popper phase, Sr3Co2O5(OH)2·2H2O, exhibits excellent performance especially in the oxygen evolution reaction.