Rapid preparation and electrochemical behavior of carbon-coated Li3V2(PO4)3 from wet coordination

An improved solid-state coordination method namely wet coordination has been developed to synthesize carbon-coated monoclinic Li3V2(PO4)3 rapidly at a low temperature of 600 °C in 1 h. The structure of the sample was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) and energy dispersive analysis of X-rays (EDAX). The diffusion coefficient of the lithium ions was measured by cyclic voltammetry (CV). The electrochemical behavior of the sample exhibits a high initial discharge capacity of 130 mAh g−1, which is very close to its theoretical capacity of 132 mAh g−1 under 95 mA g−1 (0.67 C) in the range of 3.3–4.3 V (vs. Li/Li+). These results suggest that wet coordination is a promising method for large-scale production of carbon-coated Li3V2(PO4)3.