Synthesis of nano-sized lithium cobalt oxide via a sol-gel method

► A novel sol-gel method coupling with a spin-coating process was used. ► Effects of molar ratio of Li:Co and the proportion of total metallic ion density:PAA density on the formation of nano-sized LiCoO2 on silicon substrate were studied. ► Optimized calcination temperature facilitates a dense film with uniform particles and prevents porous structures formed on the substrate surface. ► Multiple-layers favor the formation of the homogeneous films with nano-sized particulars.