NaCo2O4

NaCo2O4 is a layered oxide ceramic compound combining sodium and cobalt in a mixed-valence structure, belonging to the family of transition metal oxides studied for electrochemical and thermal applications. This material is primarily investigated in research contexts for thermoelectric energy conversion and electrochemical energy storage, where its layered crystal structure and mixed-valence cobalt sites enable ion transport and charge carrier mobility. Its potential advantages in thermoelectric applications—where thermal and electrical properties are simultaneously important—and in cathode materials for sodium-ion batteries make it a candidate for next-generation energy devices, though it remains largely in the development phase rather than widespread industrial production.