Fe-doped V₂O₅layered nanowire cathode material with high lithium storage performance

As a lithium-ion battery cathode material with high theoretical capacity, the application of V₂O₅is limited by its unstable structure and low intrinsic conductivity. In this paper, we report a Fe doped V₂O₅nanowire with a layered structure of 200-300 nm diameter prepared by electrostatic spinning technique. The 3Fe-V₂O₅electrode exhibited a superb capacity of 436.9 mAh g^-1in the first cycle when tested in the voltage range of 2.0-4.0 V at current density of 100 mA g^-1, far exceeding its theoretical capacity (294 mAh g^-1), and the high capacity of 312 mAh g^-1was still maintained after 50 cycles. The superb performance is mainly attributed to its unique layered nanowire structure and the enhanced electrical conductivity as well as optimized structure brought by Fe-doping. This work made the homogeneous doping and nanosizing of the material easily achieved through electrostatic spinning technology, leading to an increase in the initial capacity of the V₂O₅cathode material and the cycling stability compared to the pure V₂O₅, which is an extremely meaningful exploration.