Structural characterization and electrochemical performance of lithium trivanadate synthesized by microwave sol–gel method

The Li1+xV3O8 material was successfully synthesized at 450 °C in short sintering duration by microwave sol–gel route. X-ray diffraction suggests oxygen defects in the lattice. Based on Randles–Sevcik formula, cyclic voltammograms measurements were conducted to measure Li+ ion diffusion coefficient. The material exhibits high discharge capacity of 250 mA g−1 at 0.2 mA/cm2 after 30 cycles in the range of 2.0–4.0 V. Alternating current impedance tests show that the growth of the charge transfer resistance at 0.4 mA/cm2 is more rapid than that of at 0.2 mA/cm2 as the galvanostatical charge–discharge continues.