CaV6O16·3H2O nanorods as cathode for high-performance aqueous zinc-ion battery

Abstract The cathode materials used in aqueous zinc-ion batteries (ZIBs) suffer from poor cycling performance, which largely restricts the development of aqueous ZIBs. A one-dimensional rod-like CaV6O16·3H2O cathode is designed and fabricated for aqueous ZIBs via a simple hydrothermal route. The unique interlayered structure of CaV6O16·3H2O nanorods provides sufficient interlayer spacing for mass transfer and electrons/ions transportation. Besides, the synergistic effect between V6O16 frameworks and intercalated Ca atoms as well as water molecules improves the stability of electrode materials. Herein, the as-prepared CaV6O16·H2O cathode displays an enhanced cycle ability and excellent rate capability, highlighting the material advantages for an environment-friendly application and devices.