Facile Preparation of V2O5 Hollow Microspheres with Mesoporous on the Shell and Their Electrochemical Properties for Lithium-Ion Batteries

Abstract

In this work, vanadium pentoxide (V2O5) hollow microspheres with mesoporous on the shell were prepared by a solvothermal process followed by a high-temperature calcination step in air. The as-prepared hollow microspheres exhibit the mesoporous structure on the shells, which provide channels for electrolyte transfer and show excellent lithium storage properties for lithium-ion batteries. The electrochemical performances of formed V2O5 porous-hollow microsphere anodes were investigated and analyzed. Among the formed samples, integral V2O5 hollow microspheres with mesoporous on the shell achieved a reversible capacity of 710.2 mA h g−1 after 400 cycles at a current density of 0.5 A g−1. The results demonstrate an ascendant electrochemical characteristic of as-prepared V2O5 hollow microspheres with mesoporous on the shell for the energy storage devices.