Electrochemical performance of LiV 3− xNi xO 8 cathode materials synthesized by a novel low-temperature solid-state method

Abstract

A series of cathode materials for lithium ion batteries with the formula LiV 3− x Ni x O 8 ( x = 0.000, 0.025, 0.050 and 0.100) have been synthesized by a novel low-temperature solid-state method. The synthesized cathode materials have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), discharge–charge test, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). These results indicate that LiV 2.95Ni 0.050O 8 shows much better electrochemical performances than LiV 3O 8. This is due to better electrochemical reversibility and lower particle-to-particle resistance after Ni 2+ doping.