Li4 Co2 O4 F2

Li₄Co₂O₄F₂ is a mixed-valence lithium cobalt oxide fluoride compound, a ceramic semiconductor belonging to the layered oxide family with fluorine substitution. This material is primarily of research interest for energy storage and electrochemical applications, where fluorine doping and mixed-metal coordination are being explored to enhance ionic conductivity and electrochemical stability compared to conventional lithium cobalt oxides. The fluorine incorporation is notable for modifying the crystal structure and electronic properties, making it a candidate for next-generation lithium-ion battery cathodes or solid electrolyte development, though it remains largely in the experimental phase rather than established commercial production.