Rapid preparation and electrochemical behavior of carbon-coated Li3V2(PO4)3 from wet coordination |
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| Authors: | Lian Wang Xianquan Jiang XiaoQing Pi Feng Wu |
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| Affiliation: | a Chongqing Academy of Science & Technology, Chongqing 401123, China
b School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | 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. |
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| Keywords: | Carbon-coated lithium vanadium phosphates Wet coordination LiF Lithium-ion batteries Electrochemical behavior |
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