Harnessing oxygen vacancy in V2O5 as high performing aqueous zinc-ion battery cathode

•In the present work, oxygen vacancies are introduced into V2O5 lattice for high performing aqueous zinc-ion battery.•The battery reaches an ultra-long cyclic duration of 620 h at 0.2 A g−1 without any significant capacity fading.•The oxygen-deficient V2O5 possesses significantly higher specific capacity and better cyclic stability than pristine V2O5.