Reversible phase transformation of titania (anatase) nanotubes upon electrochemical lithium-intercalation observed by ex situ transmission electron microscopy

226Microstructural changes in TiO2 (anatase) nanotubes have been reported upon electrochemical Li-insertion/de-insertion using ex situ transmission electron microscopy. Reversible phase transformations from tetragonal (anatase) to orthorhombic (Li-titanate) polymorphs and back to tetragonal (anatase) in complete discharging/charging cycled TiO2 NTs are observed.