中文摘要：

采用溶胶-凝胶法合成了TiO2-CeO2薄膜，XRD、SEM、紫外可见透射光谱、循环伏安法等测试结果表明：经500℃热处理1h后的TiO2-CeO2薄膜呈面心立方方铈矿结构，其薄膜表面光滑，光学透过率高于80％，电荷存储量可达9．46mC·cm^-2，循环可逆性K为95％，是一种性能优良的电荷储存材料．同时采用聚（3，4-乙撑二氧噻吩）PEDOT／PSS为电致变色活性材料，制备了对称结构（ITO｜｜PEDOT／PSS｜｜PMMA／PC—LiClO4｜｜PEDOT／PSS｜｜ITO）和非对称结构（ITO｜｜PEDOT／PSS｜｜PMMA／PC—LiClO4｜｜TiO2-CeO2｜｜ITO）的大面积（10cm×10cm）电致变色器件，发现二者的对比度分别为17％、23．4％，褪色响应时间则分别为0．9s和2．8s，具有良好的应用性能．

英文摘要：

TiO2-CeO2 composite films on ITO glass substrate were prepared by sol-gel process. The structure and properties of the films were characterized by XRD, SEM, UV-vis transmitted spectrum and cyclic voltammetry, respectively. The results show that TiO2-CeO2 thin films can translate into face center cubic cerium ore after heat treatment at 500℃ for 1 h, with optical transmittances of over 80% , the capacity of charge storage of 9.46 mC .era-2 and the cycle of reversible K of 95%. All the characteristics above make it be a kind of good charge storage material. Besides, poly（3,4- ethylenedioxythiophene） PEDOT/PSS is used as the electrochromic active material to prepare symmetric structured （ITO ｜｜ PEDOT/PSS ｜｜ electrolyte ｜｜ PEDOT/PSS ｜｜ ITO）and asymmetric structured （ITO｜｜ PEDOT/PSS ｜｜ electrolyte ｜｜ TiO2-CeO2 ｜｜ ITO） eleetrochromic devices with a large area of （10× 10） cm2 respectively. It is found that their optical contrast ratio reach to 17% and 23.4% with the corresponding fade response time of 0.9 s and 2.8 s, respectively.