Vanadium-based oxides with high theoretical specific capacities and open crystal structures are promising cathodes for aqueous zinc-ion batteries (AZIBs). In this work, the confined synthesis can insert metal ions into the interlayer spacing of layered vanadium oxide nanobelts without changing the original morphology. Furthermore, we obtain a series of nanomaterials based on metal-confined nanobelts, and describe the effect of interlayer spacing on the electrochemical performance. The electrochemical properties of the obtained Al2.65 V6 O13 ⋅ 2.07H2 O as cathodes for AZIBs are remarkably improved with a high initial capacity of 571.7 mAh ⋅ g-1 at 1.0 A g-1 . Even at a high current density of 5.0 A g-1 , the initial capacity can still reach 205.7 mAh g-1 , with a high capacity retention of 89.2 % after 2000 cycles. This study demonstrates that nanobelts confined with metal ions can significantly improve energy storage applications, revealing new avenues for enhancing the electrochemical performance of AZIBs.
Keywords: Aqueous Zinc-Ion; Batteries; Confined; Mechanism; Nanobelts; Vanadium Oxide.
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