Hollow microspheres of V2O5 and Cu-doped V2O5 as cathode materials for lithium-ion batteries

Highly crystallized V2O5 hollow microspheres were prepared by a self-assembly method and successfully doped with Cu. X-ray diffraction, Fourier-transform infrared spectrometry, scanning electron microscopy, transmission electron microscopy, cyclic voltammetry and galvanostatic cell cycling were employed to characterize the samples. The V2O5 hollow microspheres had a high capacity of 319 mAh g−1 in the potential region 4.0–2.0 V. The Cu-doped V2O5 microspheres exhibited better cycling performance due to their stabilized structure and increased conductivity.