Na2 Mn4 O8

Na₂Mn₄O₈ is a manganese oxide compound with layered crystal structure, classified as a semiconductor oxide that exhibits mixed-valence manganese chemistry. This material is primarily of research interest for energy storage and catalysis applications, where its layered framework and redox-active manganese sites make it a candidate for lithium-ion battery cathodes, sodium-ion batteries, and electrochemical supercapacitors. Compared to conventional layered oxides, sodium manganese oxides offer potential cost advantages and resource availability, though the material remains under active development rather than in widespread commercial deployment.