Template-Free Synthesis of SnO2 Hollow Nanostructures with High Lithium Storage Capacity

A facile one‐step template‐free method based on a novel inside‐out Ostwald ripening mechanism is developed for inexpensive mass preparation of hollow and hollow core/shell‐type SnO2 nanostructures using potassium stannate as the precursor. As‐prepared SnO2 hollow nanospheres (see figure) exhibit ultrahigh lithium storage capacity and improved cycle performance as high‐energy anode materials in lithium‐ion secondary batteries.