Na12 Co2 O8

Na₁₂Co₂O₈ is a mixed-valence cobalt oxide compound with a layered crystal structure, belonging to the family of sodium-cobalt oxides that exhibit semiconductor or metallic behavior depending on preparation and doping. This material is primarily of research interest for electrochemical energy storage applications, particularly as a cathode material for sodium-ion batteries and supercapacitors, where its mixed oxidation states and ion-transport properties offer potential advantages over traditional lithium-based systems. Compared to conventional cathodes, sodium-cobalt oxides are attractive for cost reduction and resource abundance, making them notable in the context of next-generation battery development and grid-scale energy storage.