Two-Dimensional VO2 Nanosheets with a Controllable Crystalline-Preferred Orientation for High-Performance Zinc-Ion Batteries

Due to the environmental friendliness, cost-effectiveness and inherent safety, rechargeable aqueous zinc ion batteries have attracted much interest as a promising energy storage device. VO2 is one of most common materials for batteries. The insertion/extraction ions within highly anisotropic, with different channel sizes along axes. Therefore, it quite important control orientation crystals so manipulate transportation Zn2+ more effectively sufficiently. Herein, novel intercalation-type two-dimensional nanosheet preferred (PO-VO2) c-axis was prepared. Benefitting from structural merits, PO-VO2 nanosheets demonstrate an attractive capacity 511.6 mAh g−1 at current density 0.05 A in voltage 0.2–1.6 V, which obviously better than that many vanadium oxide-based cathodes reported until now. PO-VO2//Zn full cell exhibits high 290.5 Wh kg−1 power 38.4 W (based on mass cathode electrode). outstanding behavior, together facile affordable synthesis route, endows applications