• batteries;
  • dissolution–splitting method;
  • multielectron reactions;
  • nanosheets;
  • vanadium pentoxide


One of the great challenges in the development of next-generation lithium ion batteries is to simultaneously achieve high power and large energy capacity. Herein, large-area pure V2O5 nanosheets are successfully synthesized by a novel and facile dissolution–splitting method using low-cost raw materials. The as-prepared product exhibits enhanced lithium storage properties including high reversible capacity (290 mAh g−1), good cycling and rate performance (144 mAh g−1 at 10 C and 95 mAh g−1 at 20 C), which can deliver a high power density of 15.6 kW kg−1 while the energy density remains as high as 260 Wh kg−1. At low temperatures of 0 and −20 oC, the V2O5 nanosheets can still deliver high capacities of 184 and 158 mAh g−1 at 1 C, respectively, and also exhibit excellent cycling stability.