溶胶凝胶法合成Li3V6O16及其电化学性能研究

摘要

In this paper, a new type of crystal Li3V6O16 was synthesized by sol-gel method, using hydrogen peroxide as the complexing agent, CH3COOLi·2H2O and Y2O5 as raw material. The prepared product was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS) and charge-discharge test.SEM observation showed that the nano-flake crystals possesses relatively smooth surface.TEM and SAED studies confirmed the results indicated by XRD and SEM investigations. The results of charge-discharge test demonstrated that the active material revealed a high specific capacity, excellent cycle stability and reversibility.%本文以双氧水为配位剂,以CH3COOLi·2H2O和V2O5为原料,采用溶胶凝胶法合成了一种新型的晶体Li3V6O16.随后分别采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和电子衍射(SAED)、X光电子能谱(XPS)和充放电测试等手段对材料进行了表征.SEM观察表明,产物主要是表面比较光滑的纳米片状晶体,TEM和SAED研究都证实了XRD和SEM的研究结果.充放电测试结果表明,该物质具有较高的比容量、良好的可逆性和循环稳定性.