ABSTRACT Vanadium (V)‐based composites are promising cathodes for aqueous zinc (Zn)‐ion batteries (AZIBs), but their low surface area, poor conductivity, and sluggish Zn 2+ diffusion severely limit performance. Here, metal–organic‐framework‐derived porous Na 0.33 V 2 O 5 (NVO) nanobelts (NBs) are synthesized by a simple hydrothermal route, with controlled sodium (Na) contents of 1, 3, and 5 wt%. Strong Na─O bonding with lattice oxygen reinforces the layered framework and stabilizes the structure during cycling. Among them, the NVO‐3wt% electrode delivers a high specific capacity of 650 mA h g −1 at 0.5 A g −1 , excellent rate capability (298 mA h g −1 at 32 A g −1 ), and outstanding long‐term durability with ∼85% capacity retention at 30 A g −1 after 20 000 cycles. Ex situ structural and spectroscopic analyses reveal a reversible mixed Zn 2+ /H + storage mechanism in NVO‐3wt%. In addition, flexible full cells are assembled using NVO‐3wt% cathodes, highlighting their strong potential for application in wearable AZIBs. Hence, this study holds significance for developing high‐performance V‐based electrodes for wearable AZIBs.
Kakarla et al. (Wed,) studied this question.