Enhanced electrochemical properties of fluoride-coated LiCoO2 thin films

The electrochemical properties of fluoride-coated lithium cobalt oxide [LiCoO₂] thin films were characterized. Aluminum fluoride [AlF₃] and lanthanum fluoride [LaF₃] coating layers were fabricated on a pristine LiCoO₂ thin film by using a spin-coating process. The AlF₃- and LaF₃-coated films exhibited a higher rate capability, cyclic performance, and stability at high temperature than the pristine film. This indicates that the AlF₃ and LaF₃ layers effectively protected the surface of the pristine LiCoO₂ film from the reactive electrolyte.