As a result of prices of fossil fuels and the increased energy demand, reasonable utilization of renewable energy sources has become a global topic, rechargeable aqueous zinc-ion batteries (ZIBs) are considered as the large-scale energy storage because there is an abundant zinc source, and ZIBs provide reliable safety, eco-friendliness, and high specific capacity. Nevertheless, the limited electroactive sites and low electrical conductivity of vanadium oxide (V₂O₅)-based cathode for ZIBs inevitably destabilizes the energy storing reactions, impeding the diffusion of zinc ion and electron movement. Here, to lower the insertion energetics and diffusion barriers of zinc ion, we reported iron (Fe)-doped V₂O₅ with the nanorod architecture by utilization of electrospun polyacrylonitrile fiber templates; these exhibited a high energy density of 540 W h kg⁻¹ at a power density of 600 W kg⁻¹, and a good capacity retention of 85% after up to 160 cycles. The Fe-doping effects in V₂O₅ matrix with the nanorod architecture provides abundant contact with electrolyte, an increased electrical conductivity, and shortened ionic diffusion distance during electrochemical processes, facilitating overall energy-storing performance. This work provides a necessary strategy for designing next-generation high-performance energy storage devices.

由于化石燃料价格上涨和能源需求增加，合理利用可再生能源已成为一个全球性话题，可充电水性锌离子电池（ZIBs）被认为是大规模的能源存储，因为锌含量很高。源和ZIB提供可靠的安全性，生态友好性和高比容量。然而，用于ZIB的基于钒氧化物（V ₂ O ₅）的阴极有限的电活性位和低电导率不可避免地破坏了能量存储反应的稳定性，从而阻碍了锌离子的扩散和电子运动。在这里，为了降低锌离子的插入能级和扩散势垒，我们报道了掺铁（Fe）的V ₂ O ₅通过利用电纺聚丙烯腈纤维模板制成纳米棒结构；在功率密度为600 W kg ^-1时，它们表现出540 W h kg ^-1的高能量密度，在经过多达160个循环后仍具有85％的良好容量保持率。在具有纳米棒结构的V ₂ O ₅基体中的Fe掺杂作用提供了与电解质的充分接触，增加了电导率，并缩短了电化学过程中的离子扩散距离，从而促进了整体储能性能。这项工作为设计下一代高性能储能设备提供了必要的策略。