Nanofiber-to-nanorod transformation during annealing of electrochemically deposited vanadium oxide nanofibers

► Thermal annealing enables the transformation of Na+V2O5 nanofibers into nanorods. ► Potential application as cathode for energy storage devices. ► The rods are single crystals of Na0.33V2O5 bronze with a monoclinic structure. ► The nanorod formation was suggested to be driven by a crystallization process.