溶胶凝胶法合成Li_3V_6O_(16)及其电化学性能研究  

Sol-Gel Synthesis and Electrochemical Study of Li_3V_6O_(16)

作　　者：张孟雄[1] 张友祥[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072

出　　处：《无机化学学报》2012年第10期2065-2070,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20901062)资助项目

摘　　要：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。In this paper, a new type of crystal Li3V6O16 was synthesized by sol-gel method, using hydrogen peroxide as the eomplexing agent, CH3COOLi·2H2O and V2O5 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.

关 键 词：溶胶凝胶法 Li3V6O16 电化学性能 

分 类 号：O614.111[理学—无机化学] O614.511[理学—化学]