Aqueous zinc-ion batteries (ZIBs) have obtained increasing attention owing to the high safety, material abundance, and environmental benignity. However, the development of cathode materials with high capacity and stable cyclability is still a challenge. Herein, the polypyrrole (PPy)-wrapped V₂O₅ nanowire (V₂O₅/PPy) composite was synthesized by a surface-initiated polymerization strategy, ascribing to the redox reaction between V₂O₅ and pyrrole. The introduction of PPy on the surface of V₂O₅ nanowires not only enhanced the electronic conductivity of the active materials but also reduced the V₂O₅ dissolution. As a result, the V₂O₅/PPy composite cathode exhibits a high specific capacity of 466 mAh g^–1 at 0.1 A g^–1 and a superior cycling stability with 95% capacity retention after 1000 cycles at a high current density of 5 A g^–1. The superior electrochemical performance is ascribed to the large ratio of capacitive contribution (92% at 1 mV s^–1) and a fast Zn²⁺ diffusion rate. This work presents a simple method for fabricating V₂O₅/PPy composite toward advanced ZIBs.

锌离子水电池（ZIBs）由于其高安全性，材料丰富性和环境友好性而受到越来越多的关注。然而，开发具有高容量和稳定的可循环性的阴极材料仍然是挑战。在此，通过表面引发的聚合策略合成了聚吡咯（PPy）包裹的V ₂ O ₅纳米线（V ₂ O ₅ / PPy）复合材料，这归因于V ₂ O ₅与吡咯之间的氧化还原反应。在V ₂ O ₅纳米线表面引入PPy不仅增强了活性材料的电子传导性，还降低了V ₂ O₅溶解。结果，V ₂ O ₅ / PPy复合阴极在0.1 A g ^–1时显示出466 mAh g ^–1的高比容量，在5次高电流密度下1000次循环后仍具有出色的循环稳定性和95％的容量保持率A g ^–1。优异的电化学性能归因于较大的电容贡献率（1 mV s ^–1时为92％）和快速的Zn ²⁺扩散速率。这项工作提出了一种向高级ZIBs生产V ₂ O ₅ / PPy复合材料的简单方法。