Fe-doped V₂O₅ layered nanowire cathode material with high lithium storage performance

Abstract

As a lithium-ion battery cathode material with high theoretical capacity, the application of V2O5 is limited by its unstable structure and low intrinsic conductivity. In this paper, we report a Fe doped V2O5 nanowire with a layered structure of 200-300 nm diameter prepared by electrostatic spinning technique. The 3Fe-V2O5 electrode exhibited a superb capacity of 436.9 mAh/g in the first cycle when tested in the voltage range of 2.0-4.0 V at current density of 100 mA/g, far exceeding its theoretical capacity (294 mAh/g), and the high capacity of 312 mAh/g was 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 V2O5 cathode material and the cycling stability compared to the pure V2O5, which is an extremely meaningful exploration

Review—Development Status and Improvement Measures of Electrode Materials for Aqueous Zinc Ion Batteries

“…However, in zinc ion batteries, vanadium mostly exists in a layered structure, allowing zinc ions and electrons to move between the two layers. 29,30 For VO 2 , there are many different crystal forms, such as monoclinic, rutile, tetragonal, and metastable crystals. In the positive electrode material, it will form a tunnel like structure with a sufficiently large diameter and good stability that is not easily deformed.…”

Beyond conventional batteries: a review on semi-solid and redox targeting flow batteries-LiFePO4 as a case study

“…[32][33][34] However, the sluggish diffusion kinetics of lithium ions and the poor electronic conductivity, resulting in a signicant capacity loss at high C-rate, are the main obstacles that limit the performances of this material. Several strategies have been developed to overcome the aforementioned issues such as particle size reduction, [35][36][37] surface coating, [38][39][40][41] preparation of composite electrodes, [42][43][44] addition of conductive binders, [45][46][47] and doping. [48][49][50][51] All these strategies have shown encouraging results in lithium-ion batteries, but less attention has been given to the application of these advanced LFP based materials for redox ow batteries.…”