Advances and Perspectives of Ion-Intercalated Vanadium Oxide Cathodes for High-Performance Aqueous Zinc Ion Battery

Rechargeable aqueous zinc-ion batteries (AZIBs) are recognized as one of the most competitive next generation energy storage systems due to the high theoretical capacity (820 mAh g-1), abundant reserves, low expense, and environmental friendliness. However, in comparison to that monovalent ion secondary battery, the multivalent ion rechargeable battery faces larger metal ion sizes and higher charge/discharge number in the electrochemical reaction process, thereby suffering from larger steric resistance and the electrostatic repulsion in the intercalation-deintercalation process. At present, a great deal of research has shown that the guest ion pre-embedded host structured cathodes can effectively alleviate the above problems and improve the comprehensive performance of aqueous zinc ion battery. In this review, the development of vanadium oxide ion-intercalated cathode materials in AZIBs is reviewed, mainly including MXV2O5 center dot nH2O, MXV3O8 center dot nH2O, MXV6O13 center dot nH2O, MXV6O16 center dot nH2O, and MXV10O25 center dot nH2O type materials. The reaction mechanisms and electrochemical performance of these materials are described, and the future research directions are prospected. It is expected to provide fundamental and engineering guidance for the development of high performance AZIBs cathode materials. In this review, the research progress of vanadium-oxygen cathode using ion pre-intercalation strategy in recent years is summarized, including MXV2O5 center dot nH2O, MXV3O8 center dot nH2O, MXV6O13 center dot nH2O, MXV6O16 center dot nH2O, and MXV10O25 center dot nH2O type materials. The reaction mechanism and performance improvement mechanism are analyzed. The future research and development direction of high-performance AZIBs cathode materials is prospected.image