PVP x V 2 O 5 ( x = 0, 0.5 and 1) nanobelts were obtained using a simple hydrothermal process from V 2 O 5 xerogel. The structure and morphology of the samples were characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The interaction between the poly (vinyl pyrrolidone) (PVP) and V 2 O 5 xerogel in the nanocomposites was verified by Fourier transformation infrared spectroscopy (FTIR). The electrochemical cells, with a configuration Li/(LiPF 6 + EC + DMC)/(V 2 O 5 + PVP), were fabricated and their electrochemical performance was studied.