A cation-anion synergistic doped V-based cathode for high-performance aqueous zinc ion batteries

Layered V2O5 cathode holds the merits of high theoretical specific capacity(589 mA h g-1) in aqueous zinc-ion batteries（AZIBs）,yet it still suffers from inferior bulk conductivity and structure degradation notably during prolonged cycling.Herein,we ingeniously design cations(Na+/Co2+/Al3+) and anion（F-）synergistic-doped hydrated V2O5·0.48H2O cathode（VNACOF） to enhance the electronic and spatial effects in the bulk.A range of in-situ,ex-situ characterizations,and DFT calculations profoundly clarify the strengthened ionic/electronic conductivities,structural stability,and Zn2+ diffusion kinetics.As a result,the VNACOF displays a superior discharge capacity(529 mA h g-1@0.1 C),rate capabilities(488 mA h g-1@0.5 C,437 mA h g-1@1C),and cycling stability(301 mA h g-1@10 C@5000 cycles@93%)with sufficient energy density(393 W h kg-1),Furthermore,the pouch-cells with high-load（60 mg） also deliver superior cyclic(2 C@178 mA h g-1@1000 cycles@90%) and rate performance(132 mA h g-1@5 C),revealing great application potential for high-energy-density and high-stability AZIBs.