V_2O_5-TiO_2离子存储电极薄膜的溶胶-凝胶法制备与性能研究  

Sol-gel preparation and properties of V_2O_5-TiO_2 electrochemic ionic storage films

作　　者：孔庆虎[1] 朱泉峣[1] 胡思平[1] 简泽浪[1] 陈文[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《功能材料》2011年第10期1754-1757,1761,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50872101);国家重点基础研究发展计划(973计划)资助项目(2009CB939704);国家自然科学基金国际合作资助项目(NSFC-RFBR51011120252)

摘　　要：利用无机溶胶-凝胶技术制备了V2O5-(TiO2)x离子存储电极薄膜。采用X射线衍射(XRD)、原子力显微镜(AFM)、Raman光谱、循环伏安法(CV)和紫外-可见光透射光谱分别研究了复合薄膜的微观结构、化学计量、锂离子注入性能以及光学性能。结果表明复合薄膜具有V2O5的层状结构,其c轴方向的结构取向性有所降低;颗粒尺寸和表面粗糙度显著减小;同时TiO2的复合导致薄膜中V2O5的化学计量发生偏移,氧空位数量增多。当x=0.2时,薄膜具有相对较高的离子存储容量及循环稳定性,并且在离子注入/脱出状态均获得相当高的可见光透过性。V2O5-（TiO2）x composite ionic storage electrode films were successfully perpared by the modified inorganic sol-gel route.The microstructures and morphologies,stoichiometry,Li＋ intercalation and optical properties of the films were investigated by XRD,AFM,raman spretra,cyclic votammetry measurement and UV-Vis transmission spectra,respectively.The results indicated that the films have a layered V2O5 matrix structure,however,the orientation along c-axis decreased with the inhanced content of TiO2.The grain size and surface roughness of the composite films remarkablely reduced.Meanwhile TiO2 incorporation also introduced some degree of nonstoichiometry in V2O5,increased the number of oxygen vacancies.The V2O5-（TiO2）x thin films with x=0.2 have relatively higher ion storage capacity and stability,and excellent transmission characteristics in the visible region as the ion intercalation and de-intercalation.

关 键 词：溶胶-凝胶技术 V2O5 TIO2 薄膜 离子存储电极 

分 类 号：O646[理学—物理化学]