Large scale and oxygen vacancy VO 2 porous thin sheets to enable high-performance zinc ion storage.

Herein, we report the first result of large scale and oxygen vacancy VO 2 porous thin sheets assembled by a 3D interconnected nanoflake array framework, which is recorded as VO d . The as-prepared VO d was characterized by various methods and Zn 2+ intercalation/deintercalation and structural decomposition mechanisms were proposed based on ex situ X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS).