gel materials has received much significant attention recently as it can be used as highly promising cathodic materials for Li-ionbatteries. A novel kind of V2O5 aerogel materials, ambient dried V2O5 aerogel films were reported in this paper. The films were deposited by thedip-coating method and dipped into acetone and cyclohexane by turn to exchange the solvent in the films. Atomic force microscopy (AFM), X-raydiffraction topography (XRD), ellipsometry, and electrochemical measurements were employed to characterize the aerogel films. The porosity ofthe aerogel films is 56%, 16% higher than that of the xerogel films when dried at 120℃. The aerogel films have the higher capacity, as well asbetter reversibility than those of the xerogel films. The improvement of the capacity can be ascribed to the increase of porosity as well as the porediameters after the solvent exchange.

Scratch-resistance of sol-gel derived nano porous silica films were studied. The thin films were preparedwith a dip-coating method from both one-step and two-step catalyzed silica sols, and treated in a mixture gas ofammonia andwater vapour afterwards. The thin films were characterized by using Atomic Force Microscope (AFM), ellipsometer, Fourier-transform Infrared Spectroscope (FTIR), respectively. Experimental results have shown thatthe two-step catalysis remarkably improves strength of the films, and abrasion-resistance and adhesion of the silicafilms were further increased after the mixture gas treatment. It is attributed to the cross-linking of silica particlesin the sols by randomly branched or/and entangled linear chains and more Si O Si bonds formed by the mixturegas treatment.

A strengthening mechanism for sol-gel derived nano-porous silica flms was studied. The silica flms were preparedwith the dip method from two-step catalyzed silica sols and treated in a mixed atmosphere of ammonia and water vaporafterwards. Properties of the flms were analyzed by using atomic force microscopy (AFM), Fourier-transform infraredspectroscopy (FTIR), ellipsometry and an abrasion test, respectively. The experimental results have shown that the twostepcatalysis strengthens the flms and the scratch resistance of the silica flms is further improved after treatment in themixed gas. The increase in strength is attributed to the cross-linking of silica particles by randomly branched or/andentangled linear chains in the sols, more Si-O-Si bonds formed by the mixed gas treatment and structural changes inthe silica flms.

采用溶胶一凝胶技术，以钛酸丁酯Ti（0c4H2）、v2O5粉末为原材料制备了纳米结构的Ti呸。v2O5复合薄膜。使用XRD、AFM、UV-ⅥS-NIR分光光度计等方法研究了v2O5对TiO2纳米复合薄膜性能的影响。实验结果表明：v20s掺杂使复合薄膜表面颗粒尺寸增加，但仍具有纳米孔洞结构；随v205含量的增加，TiO2晶相由锐钛矿向金红石的转变率大大提高，使金红石完全转变温度降低了200℃左右；复合薄膜在紫外区域的吸收显著增强，吸收边缘发生了红移。复合薄膜定域态宽度随v2ck含量的增加而增加；光学带隙随v2O5的含量增加而减小。